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  • GM Alternator, 5/8 Inch Wide Alternator Belt Pulley, Plain
    GM Alternator, 5/8 Inch Wide Alternator Belt Pulley, Plain
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    So you've converted your Flathead-powered rod over to 12 volts and bolted a GM alternator in place. Now it's time to install the belt, but your engine pulley is 5/8" and the alternator is 1/2"!

    Don’t worry, Speedway has you covered. This alternator pulley allows the use of a 5/8" wide Flathead-style belt on GM externally regulated, SI and one-wire alternators.

  • Billet FM2121PC SBC Mid Mount Serpentine Conversion Kit, Keyway Shaft
    Billet FM2121PC SBC Mid Mount Serpentine Conversion Kit, Keyway Shaft
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                Please view the product's page for more information
            
  • Small Block Chevy Inboard Drive Kits, Alternator
    Small Block Chevy Inboard Drive Kits, Alternator
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    We all know what a pain it is to come up with a pulley, bracket, and belt combination to work on your small block Chevy engine. We have pre-engineered our package to include the nuts, bolts, polished billet aluminum brackets and belts to make this a simple installation. Each kit also includes a new short style aluminum water pump, aluminum pulleys, one wire chrome alternator and if chosen, a chrome A/C compressor. 

    Inboard (high) mount brackets for early cars.

    Alternator only kits include single groove pulleys.

    Note: S/B Chevy, short style water pump only.

  • Powermaster 170 Serpentine Alternator Drive Kit / Water Pump Drive System
    Powermaster 170 Serpentine Alternator Drive Kit / Water Pump Drive System
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                Convert your Powermaster 50 or 75 amp mini alternator to a 3 groove serpentine style belt. This system will not interfere with any other pulleys being used, as it mounts on the front of the water pump pulley. Comes complete with alternator and water pump pulleys and a 24" belt.
    • Includes 2 pulleys and 24" belt
    Note: Serpentine style belts are not approved for IMCA Northern Sport Mods
  • Tuff Stuff Silver Bullet One Wire Alternators - 100 Amp GM V-Belt Pulley
    Tuff Stuff Silver Bullet One Wire Alternators - 100 Amp GM V-Belt Pulley
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    The Silver Bullet 1-wire alternators are 100% new construction with a distinctive billet fan and pulley for good looks and increased performance. They are a one-wire hook-up with ultra low cut-in regulator which charges from a idle up to highway speeds.

    Fits GM mounts with V-belt pulley. 100 amp rating. Available in black powder coated or chrome finish.

  • Small Block Chevy Inboard Drive Kits, Alternator & AC
    Small Block Chevy Inboard Drive Kits, Alternator & AC
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    We all know what a pain it is to come up with a pulley, bracket, and belt combination to work on your small block Chevy engine. We have pre-engineered our package to include the nuts, bolts, polished billet aluminum brackets and belts to make this a simple installation. Each kit also includes a new short style aluminum water pump, aluminum pulleys, one wire chrome alternator and if chosen, a chrome A/C compressor. 

    Inboard (high) mount brackets for early cars.

    Alternator and A/C kits include dual groove pulleys.

    Bracket kit works with dual quad & 3-2 low rise intakes.

    Note: S/B Chevy, short style water pump only.

  • Flathead Alternator Pulley with Fan Mount
    Flathead Alternator Pulley with Fan Mount
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                This pulley fits GM alternators and allows you to mount a vintage '32-'38 Ford fan to it. This Pulley uses 5/8" wide belt.
            
  • Chrome Dual Goove Alternator Pulley
    Chrome Dual Goove Alternator Pulley
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                Chrome plated steel pulley for GM or Ford alternators. Pulley works with 3/8" wide V-belts.
            
  • GM Alternator 5/8 Inch Wide Belt Pulley, Aluminum
    GM Alternator 5/8 Inch Wide Belt Pulley, Aluminum
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    So, you've converted over to a 12-volt electrical system and bolted a GM alternator to your flathead Ford V8. Now it's time to install the belt and pulley, but your engine uses a 5/8" belt and the alternator pulley is 1/2"! Don't worry – Speedway has you covered. This aluminum pulley is designed to fit on a GM alternator and use a 5/8" drive belt.

    • Used on popular GM externally regulated, "SI" and one-wire alternators
    • Fits 1963 and newer GM alternators
    • Allows the use of the 5/8" wide flathead Ford style V-belts
    • Attractive and durable aluminum construction
  • GM Alternator 5/8 Inch Wide Belt Pulley, Chrome
    GM Alternator 5/8 Inch Wide Belt Pulley, Chrome
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    So, you've converted over to a 12-volt electrical system and bolted a GM alternator to your flathead Ford V8. Now it's time to install the belt and pulley, but your engine uses a 5/8" belt and the alternator pulley is 1/2"! Don't worry – Speedway has you covered. This chrome pulley is designed to fit on a GM alternator and use a 5/8" drive belt.

    • Allows the use of 5/8" wide flathead-style belts on popular GM externally regulated, "SI" and one-wire alternators
    • Durable and attractive chrome finish
    • Fits 1963 and newer GM alternators

     

  • Powergen 1949-53 Flathead Ford One Wire Alternator, 12 Volt
    Powergen 1949-53 Flathead Ford One Wire Alternator, 12 Volt
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    If you like traditional looks and reliable, modern performance, you’ll love this cool Flathead 1-wire alternator. It has the look of an original generator, but is really a 12-volt, negative-ground alternator that produces 60 amps at idle and 75 amps going down the road. This model is designed to fit 1949-1953 Ford & Mercury Cars and 1948-1953 Ford Trucks with Flathead V8s and features a simple one-wire hookup.

    We offer this one wire alternator in black painted or polished aluminum, and both include stock-appearing mounting brackets (the stock fan carrier bolts to that bracket) and pulleys that accept wide 5/8” belts.

    • Easy one-wire hookup
    • 5/8" wide belt pulley included
    • If using 3/8" wide belt, order pulley # 91067178
    • Uses stock-appearing bracket and fan carrier bolts

    910-67165 Instructions (PDF)

  • Powermaster 8-881 Snug Mount 100 AMP Alternator Kit
    Powermaster 8-881 Snug Mount 100 AMP Alternator Kit
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    Mounts alternator on Iower driver's side. Fits S/B Chevy short water pump. Includes alternator, brackets, bolts, spacers, pulley and belt. Maintains 14.9 volts. From crankshaft centerline to outer edge of alternator is 12.3". 

    Contains:

    •  -Alternator
    •  -Alternator Pulley
    •  -Pulley-Crank Kit
    •  -Belt
    •  -Alternator Mounting Bracket
  • Powergen 1949-1953 Flathead Ford One Wire Alternator, 6 Volt
    Powergen 1949-1953 Flathead Ford One Wire Alternator, 6 Volt
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    If you like traditional looks and reliable, modern performance, you’ll love this cool Flathead alternator. It has the look of an original generator, but is really a 6-volt, positive-ground alternator that produces 60 amps at idle and 75 amps going down the road. This 1-wire alternator is designed to fit 1949-1953 Ford & Mercury Cars and 1948-1953 Ford Trucks with Flathead V8s and features a simple one-wire hookup.

    We offer it in black painted or polished aluminum, and both include stock-appearing mounting brackets (the stock fan carrier bolts to that bracket) and pulleys that accept wide 5/8” belts.

    • Easy one-wire hookup
    • 5/8" wide belt pulley included
    • If using 3/8" wide belt, order pulley # 91067178
    • Uses stock-appearing bracket and fan carrier bolts

    Flathead One Wire Alternator Instructions (PDF)

    Powergen Cutaway View (Link) 

    Flathead One Wire Alternator Specifications (Link) 

  • Tuff Stuff Silver Bullet One Wire Alternator - 140 Amp GM V-Belt Pulley
    Tuff Stuff Silver Bullet One Wire Alternator - 140 Amp GM V-Belt Pulley
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    The Silver Bullet alternators are 100% new construction with a distinctive billet fan and pulley for good looks and increased performance. They are a one-wire hook-up with ultra low cut-in regulator which charges from a idle up to highway speeds.

    Fits GM mounts with V-belt pulley. 140 amp rating. Available in black powder coated or chrome finish.

    This alternator generates 80 AMPS at idle (750 RPM x 2.5 Pulley Ratio). 

  • Powermaster 8-722 Small Block Chevy 75 Amp Mini Alternator w/Serp-Belt Kit
    Powermaster 8-722 Small Block Chevy 75 Amp Mini Alternator w/Serp-Belt Kit
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    Powermaster provides all the electrical punch you need, while saving weight and space with these racing alternator kits. One-wire unit for small block Chevy using short pump only. Mounts on either side of engine. Cranks out 14.7 volts and 75 amps. Kit includes mini alternator, brackets, bolts, spacers, drive pulley and belt.

    • True 1-wire hookup with set voltage of 14.7
    • High output to weight ratio
    • Excellent idle output
    • Gold battery post
    • Operating Range: -40°C to 150°C
    • Max RPM: 18,000
    • Weight: 8.885 lbs.

    NOTE:  Mini alternators are NOT IMCA approved for Hobby Stock or Sport Mod Divisions.

  • Powermaster 8-800 Small Block Chevy 50 Amp Mini Alternator Kit w/V-Belt
    Powermaster 8-800 Small Block Chevy 50 Amp Mini Alternator Kit w/V-Belt
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    Powermaster provides all the electrical punch you need, while saving weight and space. One-wire unit for small block Chevys using short water pumps. Mounts on either side of engine. Cranks out 14.7 volts and 53 amps. Kit includes mini alternator, brackets, bolts, spacers, drive pulley and belt.

    • True 1-wire hookup with set voltage of 14.7
    • High output to weight ratio
    • Low drag, high speed bearings
    • Black heat dispersant coating

     

    Small Block Chevy Mini Alternator Dimensions (Link)

  • Powermaster 8-801 Small Block Chevy 50 Amp Mini Alternator Kit w/Serp-Belt
    Powermaster 8-801 Small Block Chevy 50 Amp Mini Alternator Kit w/Serp-Belt
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    Powermaster provides all the electrical punch you need, while saving weight and space. One-wire unit for small block Chevys using short water pumps. Mounts on either side of engine. Cranks out 14.7 volts and 53 amps. Kit includes mini alternator, brackets, bolts, spacers, drive pulley and belt.

    • True 1-wire hookup with set voltage of 14.7
    • High output to weight ratio
    • Low drag, high speed bearings
    • Black heat dispersant coating

    NOTE: Mini alternators are NOT IMCA approved for Hobby Stock or Sport Mod Divisions.

    Small Block Chevy Mini Alternator Dimensions (Link)

  • Billet GM Alternator Pulley
    $29.99
    Product Rating: 3.00 Stars
    Billet GM Alternator Pulley
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                Machined from billet 6061 aluminum (not a casting). Pulley features a nose cover. Measures 2-3/4" in diameter.
            
  • Powermaster 8-721 Small Block Chevy 75 Amp Mini Alternator w/V-Belt Kit
    Powermaster 8-721 Small Block Chevy 75 Amp Mini Alternator w/V-Belt Kit
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    Powermaster provides all the electrical punch you need, while saving weight and space with these racing alternator kits. One-wire unit for small block Chevy using short pump only. Mounts on either side of engine. Cranks out 14.7 volts and 75 amps. Kit includes mini alternator, brackets, bolts, spacers, drive pulley and belt.

    • True 1-wire hookup with set voltage of 14.7
    • High output to weight ratio
    • Excellent idle output
    • Gold battery post
    • Operating Range: -40°C to 150°C
    • Max RPM: 18,000
    • Weight: 8.885 lbs.


  • 1999-06 Vortec LS High Mount P/S and Alternator Mount Bracket
    1999-06 Vortec LS High Mount P/S and Alternator Mount Bracket
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    If you want to move your power steering pump and alternator up to the driver side head, this is the bracket for you. It allows you to retain your original Vortec truck alternator, balancer, A/C bracket and compressor.

    Includes a billet aluminum bracket, belt and hardware.

    Installation Instructions (PDF)  

  • Garage Sale - Powermaster 8-721 Small Block Chevy 75 Amp Mini Alternator w/V-Belt Kit
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    Garage Sale - Powermaster 8-721 Small Block Chevy 75 Amp Mini Alternator w/V-Belt Kit
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                Please view the product's page for more information
            
  • Powergen 1939-48 Flathead Ford One Wire Alternator, 12 Volt
    Powergen 1939-48 Flathead Ford One Wire Alternator, 12 Volt
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    If you like traditional looks and modern performance, you’re gonna love this cool Flathead 1-wire alternator. It has the look of an original generator, but is really a 12-volt, negative-ground alternator that produces 60 amps at idle and 75 amps going down the road.

    Designed to fit 1939-1948 Ford & Mercury Cars and 1939-1947 Ford Trucks with Flathead V8s. These feature a simple one-wire hookup and are available in black or polished aluminum.

    • Retains original generator appearance
    • Easy one-wire hookup
    • 60 amps at idle
    • 75 amps at road speed
    • Uses stock mounting bracket
    • Includes pulley for 5/8" wide belt
    • Pulleys for 3/8" wide belt available seperately

    Flathead Ford One Wire Alternator Instructions (PDF)

    Powergen Cutaway View (Link) 

  • Plain 1946-1953 Flathead Alternator Bracket
    Plain 1946-1953 Flathead Alternator Bracket
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    Just because you've got a vintage Flathead Ford V8 in your ride doesn't mean you're stuck with the antiquated charging system. Switching to a tried-and-true GM 1-wire alternator is a great upgrade for any Flathead-equipped vehicle with a 12-volt electrical system.

    • Bracket fits 1946-1953 V-8 engines
    • Heavy-duty steel construction
    • Can easily be painted to match your engine
    • Designed to work with the two narrow-belt drive system typical of late '50-'53 Ford/Mercury passenger cars
    • Will not work with single wide belts unless the alternator is modified (see Notes)

    Mounting Guide (Link)

  • Powergen 1939-48 Flathead Ford One Wire Alternator, 6 Volt
    Powergen 1939-48 Flathead Ford One Wire Alternator, 6 Volt
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    If you like traditional looks and modern performance, you’re gonna love this cool Flathead 1-wire alternator. It has the look of an original generator, but is really a 6-volt, positive-ground alternator that produces 60 amps at idle and 75 amps going down the road.

    Designed to fit 1939-1948 Ford & Mercury Cars and 1939-1947 Ford Trucks with Flathead V8s. These feature a simple one-wire hookup and are available in black or polished aluminum.

    • Retains original generator appearance
    • Easy one-wire hookup
    • 60 amps at idle
    • 75 amps at road speed
    • Uses stock mounting bracket
    • Includes pulley for 5/8" wide belt
    • Pulleys for 3/8" wide belt available seperately

    910-67172 Instructions (PDF)

  • Powermaster Shorty Powergen 1949-53 Flathead Alternator, 5-1/2 Case
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    Powermaster Shorty Powergen 1949-53 Flathead Alternator, 5-1/2 Case
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    If you like traditional looks and modern performance, you’re gonna love this cool Flathead 1-wire alternator. It has the look of an original generator, but is really a 12-volt, negative-ground alternator that produces 60 amps at idle and 75 amps going down the road.  These shorty versions are great for when you need additional clearance.

    Designed to fit 1949-1953 Ford & Mercury Cars with Flathead V8s. These feature a simple one-wire hookup and are available in black or polished aluminum.

    • Retains original generator appearance
    • Shortened 1-1/2" for additional clearance
    • Easy one-wire hookup
    • 60 amps at idle
    • 75 amps at road speeds
    • Includes pulley for 5/8" wide belt
    • Pulleys for 3/8" wide belt available separately
    • 75 amps max output
    • 5-1/2" length from front to back
    • Case diameter is 1/4" larger than a stock generator

    Flathead Ford Powergen Alternator Instructions (PDF)

    Powergen Cutaway View (Link)

  • King Chrome 1970-1980 Mopar Alternator, 60 Amp
    King Chrome 1970-1980 Mopar Alternator, 60 Amp
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                Beautifully chrome plated, brand new - not rebuilt. It has a double groove pulley like our other Mopar alternators.  The I.D. of the  pulley is .663-.665 so our other pulleys should be compatible.  It is a press on  pulley. 
            
  • Small Block Chevy Outboard Drive Kits, Alternator & A/C
    Small Block Chevy Outboard Drive Kits, Alternator & A/C
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                We all know what a pain it is to come up with a pulley, bracket, and belt combination to work on your small block Chevy engine. We have pre-engineered our package to include the nuts, bolts, polished billet aluminum brackets and belts to make this a simple installation. Each kit also includes a new short style aluminum water pump, aluminum pulleys, one wire chrome alternator, and a chrome A/C compressor.  

    Outboard mount for fat fendered cars.

    Alternator and A/C kits include dual groove pulleys.

    Note: S/B Chevy, short style water pump only.
  • Tuff Stuff Silver Bullet One Wire Alternator, 140 AMP Rating
    Tuff Stuff Silver Bullet One Wire Alternator, 140 AMP Rating
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    The Silver Bullet 1 wire alternators are 100% new construction with a distinctive billet fan and pulley for good looks and increased performance. They are a one-wire hook-up with ultra low cut-in regulator which charges from a idle up to highway speeds.

    Fits GM mounts with six groove serpentine pulley. 140 amp rating. Available in black powder coated or chrome finish.

  • Holley 20-135 Drivers Side P/S & Alternator LS Acc Drive Bracket Kit
    Holley 20-135 Drivers Side P/S & Alternator LS Acc Drive Bracket Kit
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    These accessory drive brackets from Holley are great when swapping a GM LS engine into a muscle car, truck, hot rod or other vehicle. These brackets were designed to deliver a factory style appearance, correct belt alignment, and factory stability. Holley's kits supply the required brackets and hardware needed for installation.

    To determine correct application, these three easy steps will help get you going:

    • Step one is to determine your belt alignment based on your crank Pulley position on the engine you have.
    • Step two is to choose the Holley accessory drive brackets that you need (A/C, Alt & P/S or both).
    • Step three is to see which Holley installation kit your set–up requires to line up your accessories with your crank Pulley position. An application specific installation kit (part # 425211, 425212, or 425213) is REQUIRED for most applications.

    Note: When referring to guide links below, keep in mind that part numbers shown are MFG numbers without "425" prefix.

    Fitment and Required Components Guide for 20-135 Bracket Kit (PDF)

    Assembly Instructions for Holley 20-135 Accessory Drive Kit (PDF)

     

  • Small Block Chevy Outboard Drive Kits, Alternator
    Small Block Chevy Outboard Drive Kits, Alternator
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    We all know what a pain it is to come up with a pulley, bracket, and belt combination to work on your small block Chevy engine. We have pre-engineered our package to include the nuts, bolts, polished billet aluminum brackets and belts to make this a simple installation. Each kit also includes a new short style aluminum water pump, aluminum pulleys, one wire chrome alternator and if chosen, a chrome A/C compressor. 

    Outboard mount for fat fendered cars.

    Alternator only kits include single groove pulleys.

    Note: S/B Chevy, short style water pump only.

  • KRC KIT16390000 Denso Alt Bracket-Idler Tensioner Basic Drive Kit SBC
    KRC KIT16390000 Denso Alt Bracket-Idler Tensioner Basic Drive Kit SBC
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    KRC's idler tensioner is a neccessity on dirt cars because elt slippage can occur on cars that exceed 7,000 RPM. They are also vital if you use a large or heavy fixed fan blade or a fan blade with a lot of pitch. These can potentially causes overheating faster wear. This occurs on both single drive belt and pulley systems with a power steering pump mounted on the front of the engine.

    This happens because the fan belt and pulleys are required to slow the fan. The belt stretches so it slips while braking, inducing heat into the belt. The belt will continue to stretch as the race goes on, causing engine temperature to slowly climb. To properly tension the belt to prevent slippage is with an idler or tensioner pulley mounted on the passenger side of the engine. This helps the engine run cooler and the belt tighter, allowing faster acceleration out of turns & harder braking on corners.

    • Designed for GM 602 & 604 Crate Engines
    • Works great with mechanical fans
    • Assembly contains:
      • Idler - Tensioner
      • Alternator Bracket
      • 3.5" 3-Rib Serpentine Aluminum Pulley
      • Goodyear Gatorback Belt
      • Hardware and Instructions
  • Holley 20-132 LS Accessory Drive Bracket-ALT, P/S, A/C
    Holley 20-132 LS Accessory Drive Bracket-ALT, P/S, A/C
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                Please view the product's page for more information
            
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