Product Summary

  • Features an easy, one wire hook-up
  • Kit includes a pulley to fit a 5/8" wide belt
  • It uses the stock-appearing bracket and fan carrier bolts
  • Puts out 65 amp idle, 75 amp cruise, and 90 at amp top end
  • Specifically designed to fit the 1949-1953 Ford Flathead V8

Key Specs

MFG. Part #
Alternator Amperage90 amp

Need To Know

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Return Policy


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 65 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
  • 65 amp idle, 75 amp cruise, 90 amp top end
  • 5/8" wide belt pulley included
  • If using 3/8" wide belt, order pulley # 91067178
  • Uses stock-appearing bracket and fan carrier bolts



Powermaster's warranty is one year from the date of purchase on all street rod components, and 90 days for any component use for an off road or race application.

Powermaster will provide technical support regarding warranty claims and inquiries directly to the purchaser to help resolve any warranty claims or necessary technical support for warranty resolution. Component or components can be returned to Speedway Motors as long as the product is still under warranty.

All customer service inquiries pertaining to warranty and defect claims are to be handled by Speedway Motors if under one year street or 90 days race. If the product is out of warranty please contact Powermaster direct to discuss their repair and return program.


MFG. Part #
Alternator Amperage90 amp
One Wire AlternatorYes
Belt TypeV-Belt
Alternator Case StyleGenerator
Voltage Required12-Volt
Alternator Finish
Alternator MaterialAluminum
Alternator Pulley IncludedYes
Belt Width0.625"
Alternator Brackets IncludedNo
Outside Diameter
Overall Length9.00"
Slot Length1.5"
Base Width3.09"
Centerline of Holes
Sold in QuantityEach
NotesFord strap mounting design.
Belt IncludedNo
Pulley StyleV-belt
Regulator StyleInternal
Regulator IncludedYes
Coating TypePowdercoated