Product Summary

4-Barrel Spread Bore Carburetor Flange Type

  • No accessory bolt holes, just like the original heads
  • Aluminum heads shave 40 lbs. off the nose of your car vs. iron heads
  • Cast aluminum valve covers
  • Dual-plane manifold
  • Runner design "tuned" for peak torque around 3500 rpm

Comes as a Kit

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Key Specs

MFG. Part #91604071
BrandSpeedway Motors
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Need To Know

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Speedway Motors 91604071 Details

Speedway Motors new top end kit has everything you need for your small block Chevy to give it the vintage look.  Aluminum Heads, Aluminum Edelbrock Intake, Chevrolet script valve covers, gaskets, and hardware.

Kit Includes

  • (1) Edelbrock 2703 Performer EPS Chevy Intake Manifold
  • (2) Speedway Assembled Aluminum Double Hump Cylinder Heads
  • (1) Finned Small Block Chevrolet Cast Valve Covers, Pair
  • (1) Mr Gasket 6080MRG Super Intake Manifold Bolt Kit
  • (1) Speedway Steel Core Valve Cover Gaskets, Pair
  • (2) Fel-Pro 1094 S/B Chevy 265-350 Head Gasket
  • (1) Small Block Chevy Intake Gasket Set

Features:

910-3782462 Chevy SBC Assembled Aluminum Camel Double Hump 461 Cylinder Head

  • Visually similar to the 461 heads (GM # 3782461) which first appeared on the 1961 Corvette “fuelie”
  • No accessory bolt holes, just like the original heads
  • Aluminum heads shave 40 lbs. off the nose of your car vs. iron heads
  • Improved port/chamber shape for better performance and efficiency
  • Standard port location for use with most intake and exhaust manifolds
  • Designed for 1962-86 small block engines (302/327/350)

325-2703 Edelbrock 2703 Performer EPS Chevy Intake Manifold

  • Dual-plane manifold
  • Runner design "tuned" for peak torque around 3500 rpm
  • Power from off-idle to 5500 rpm
  • Dyno gains of 5 hp and 9 ft/lbs of torque on 350 Chevy
  • 3000 to 4500 rpm increased average 5+ ft/lbs
  • Includes oil fill tube and push-in breather cap

572-1004 Finned 1960-86 Small Block Chevrolet Valve Covers

  • Cast aluminum valve covers
  • 'Finned' design along with the Chevrolet script logo
  • Does not included oil fill or pcv holes

910-10207 Speedway Small Block Chevy Intake Gasket Set, 1205 Style

  • 1205 style, 1.28" x 2.09" Stock/Small Race
  • No end seals - use silicone gasket maker
  • Heat crossover port is blocked

344-1094 Fel-Pro 1094 S/B Chevy 265-350 Head Gasket

  • Superior heat dissipation
  • Multi-layer steel gaskets
  • Leakproof seal Perma Torque MLS
  • 4.100" bore, .015" thick, 3.2 cc volume

910-17001 Speedway Small Block Chevy Steel Core Valve Cover Gaskets

  • Stainless steel frame sandwiched between neoprene rubber
  • Steel core improves seal
  • Reusable
  • .175" thick
  • Fits 1960-86 small block Chevy style heads (4 perimeter bolts)

550-6080MRG Mr Gasket 6080MRG Super Intake Manifold Bolt Kit

  • Grade 5 hex head bolts
  • Black coated plated
  • Hardened flat washers

Application

The fully assembled heads are ready to run and are a great match to flat tappet camshafts. They're compatible with solid (mechanical) flat tappet or hydraulic flat tappet cams with up to .550” lift. The valve springs (single with flat wire inner damper) have a seat pressure of 120 lbs. Valves are +.100" long and must be used in conjunction with aftermarket aluminum roller rocker arms to clear valve springs used which are 1.46" diameter. The valve springs have 120 lbs. @ 1.800" installed height and 290 lbs. of open pressure at 1.20” (coil bind is at 1.160”). Pair with a vintage Duntov or 30-30 grind (or aftermarket equivalent) for a true nostalgic ‘60s experience.

Charts

Specs

Chevy SBC Assembled Aluminum Camel Double Hump 461 Cylinder Head

  • 180cc intake port volume (factory 461 casting was 160cc)
  • 62cc exhaust port volume
  • 64cc fast-burn combustion chambers deliver big power gains vs. 461 castings
  • 2.02” intake/1.60” exhaust valves (most  461 castings were 1.94/1.50)
  • 3-angle valve job promotes better flow, especially at low-to-mid lifts
  • Swirl polished & undercut stainless steel valves
  • Intake flows 232 CFM @ .500” lift
  • Exhaust flows 173 CFM @ .500” lift
  • Accepts both perimeter and center bolt valve covers
  • Single 1.46” diameter valve springs w/ inner damper
  • Suitable for flat tappet camshafts up to .550” lift
  • 7 degree lightweight chromoly retainers and keepers
  • Hardened steel spring cups for durability
  • High nickel valve seats provide optimum heat transfer and wear characteristics
  • Manganese bronze valve guides reduce friction
  • Viton positive valve seals are a modern upgrade from stock 461 castings
  • 2-piece hardened steel pushrod guide plates for use with hardened pushrods
  • 3/8” chromoly screw-in rocker arm studs included
  • Blocked exhaust heat riser manifold crossover port
  • 3/8” NPT coolant temperature probe port

 

325-2703 Edelbrock 2703 Performer EPS Chevy Intake Manifold

  • Port exit dimensions: 1.15" x 1.87"
  • Carb pad height: 4.27"

344-1094 Fel-Pro 1094 S/B Chevy 265-350 Head Gasket

  • Embossed shim
  • 4.100" gasket bore
  • Nominal compression thickness: .015"
  • Compressed volume: 3.2 cc
  • Not for use with small block 400. Extra thin to increase compression.

 

Speedway Motors 91604071 Specifications

KEY SPECS
MFG. Part #91604071
BrandSpeedway Motors
GENERAL
Carburetor Flange Type4-Barrel Spread Bore
Gasket(s) IncludedYes
Cylinder Head StyleAssembled
Combustion Chamber Volume64cc
Intake Valve Diameter2.02"
Exhaust Valve Diameter1.6"
Rocker Arms IncludedNo
Pushrods IncludedNo
Camshaft IncludedNo
Intake Manifold IncludedYes
Fuel Delivery StyleCarbureted
Intake StyleDual Plane
Timing Chain and Gears IncludedNo
Lifters IncludedNo
Cylinder Head MaterialAluminum
CNC-Machined Combustion ChamberNo
Intake Port LocationStandard
Intake Port ShapeRectangle
Exhaust Port LocationStandard
Exhaust Port ShapeSquare
Spark Plug StyleStraight
Intake Valves IncludedYes
Exhaust Valves IncludedYes
Valve Spring IncludedYes
Outside Diameter of Outer Spring1.46"
Damper Spring IncludedYes
Number of Springs Per ValveSingle
Retainer MaterialChromoly Steel
Retainers IncludedYes
Locks IncludedYes
Lock Style7 Degree
Valve Stem Seal MaterialViton Rubber
Valve Stem Seal TypePositive Stop
Rocker Arm Nuts IncludedNo
Rocker Arm Studs IncludedYes
Guideplates IncludedYes
Valve Covers IncludedYes
Guideplate Pushrod Size0.3125"
Accessory Bolt Holes DrilledNo
Valve Guide MaterialManganese Bronze
Valve Seats MachinedYes
Valve Cover Mounting StyleCenter and Perimeter Bolt
Valve Seat Machine Style3-angle
Steam Holes DrilledNo
Valve Seat MaterialPowdered Metal
Machined for O-RingNo
Heat CrossoverNo
Cylinder Head Bolts IncludedNo
Oiling StyleThrough Pushrod
Cylinder Heads IncludedYes
Head Gaskets IncludedYes
Carburetor QuantityOne
RPM RangeIdle-5,500
Intake FinishNatural
Intake MaterialAluminum
Intake Manifold Fasteners IncludedYes
Intake Runner Volume180cc
Valve Guides IncludedYes
Intake Gaskets IncludedYes
Valve Stem Seals IncludedYes
Exhaust Runner Volume62cc
Sold in QuantityKit
CNC-Machined RunnersNo

Ratings & Reviews

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not the valve covers!

3.0

3 years ago

Jimpanzer

Fremont CA

heads and intake are good but valve covers will interfere with some roller rockers causing valves to hit the pistons, Speedway unaware of this and said they could do nothing about engine damage,

Would Not Recommend

Showing 1 of 1 reviews

Questions & Answers

2 Questions • 2 Answers

Can you use a roller cam as long as it doesn't exceed 550 lift

by Amack

• 4 years ago

1 answer

Can you use with standard camshaft and push rods, lifters. ? Would I need new pushrods?

by william

• 4 years ago

1 answer

2 of 2 questions shown

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