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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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#66054 09/20/2006 3:13 AM | Joined: May 2001 Posts: 7,438 Extreme Gabster | | Extreme Gabster Joined: May 2001 Posts: 7,438 | GMC went to 6 bolt beginning with the '54 248. They and '55 1st series flywheels are 139 tooth and use a 6V starter. If you put a later 248, 270 or 302 in a 6V truck you'll need to find one of these flywheels or convert to 12V because they have 168 tooth flywheels.
Never heard of a 153 tooth flywheel. Are you sure it's GM? | | |
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