Description
Comparison points and tradeoffs
When comparing 1946-53 Flathead Alternator Bracket and Pulley Kit, Plain with other Brackets options, use this source-backed detail as the primary discriminator: Application note: Versatile Use: Compatible with all Powermaster alternators, generators, most GM alternators, and designed for both narrow two-belt and wide single-belt configurations with minimal modifications.
Use this second fact to evaluate the tradeoff: Versatile Use: Compatible with all Powermaster alternators, generators, most GM alternators, and designed for both narrow two-belt and wide single-belt configurations with minimal modifications. A third point to compare across alternatives is: Application note: Alternator Bracket Just because you’ve got a vintage FlatheadCompatible with Ford Compatible with V8 in your ride doesn’t mean you’re stuck with the antiquated charging system.
Alternative-selection boundary
Choose an alternative when its stated identifiers, application, package, or specifications better match the requirement; no unverified competitor claim is introduced here.
Complete source-backed product details
Alternator Pulley 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. Alternator Bracket Just because you’ve got a vintage FlatheadCompatible with Ford Compatible with 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 1946-1953 FlatheadCompatible with Ford and Mercury V-8 engines with WIDE belt drive systems. 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-’53Compatible with Ford/Mercury passenger cars. Will not work with single wide belts unless the alternator is modified (see Notes) 3/8″ I.D. hole for mounting the alternator. Tapped 7/16″-20 to mount to the engine.
Source product highlights
- Vintage Compatibility: Specifically designed for 1946-1953 Flathead Ford and Mercury V-8 engines with WIDE belt drive systems.
- Durable Construction: Heavy-duty steel bracket ensures longevity and can easily be painted to match your engine aesthetics.
- Seamless Adaptation: Effortlessly adapts GM alternator to original 5/8″ belt, ensuring a hassle-free installation process.
- Comprehensive Kit: Includes an alternator pulley that allows the use of a 5/8″ wide Flathead-style belt on GM alternators.
- Versatile Use: Compatible with all Powermaster alternators, generators, most GM alternators, and designed for both narrow two-belt and wide single-belt configurations with minimal modifications.




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