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Mod | | | Forums66 Topics128,026 Posts1,055,405 Members48,422 | | Most Online14,466
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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| | | | Joined: May 2010 Posts: 17 'Bolter | | 'Bolter Joined: May 2010 Posts: 17 | I am building a 54 chevy half ton pickup. I am building up a gmc 302 for it and want to use the original 235 chev. bell housing. I am told that I need a flywheel from a gmc 270 or 248. Is this correct and does anyone know where to get one or have the casting no. for one Thanks. | | | | | Joined: Dec 2004 Posts: 1,897 Shop Shark | | Shop Shark Joined: Dec 2004 Posts: 1,897 | Partially correct.
Is your truck going to be 6 volts or 12? That makes a difference for the flywheel. The 302 has a 6 bolt flange. Only 1955 and possibly 1954 248 flywheels are 6 bolt 6 volt. The later 1956-1959 270 flywheels are 6 bolt 12 volts.
Look up James Larowe. I'm sure he has the flywheel you need. | | | | | Joined: May 2010 Posts: 17 'Bolter | | 'Bolter Joined: May 2010 Posts: 17 | my truck was a 12volt. So I guess I need the newer one. Thanks | | | | | Joined: May 2001 Posts: 7,438 Extreme Gabster | | Extreme Gabster Joined: May 2001 Posts: 7,438 | Your truck may have come to you as a 12V but it came from the factory as a 6V. It's possible you still have a 6V starter. Count the teeth on your current flywheel. If it's 139 then you have a 6V starter. You'll need a 6V GMC flywheel to use it. | | | | | Joined: Dec 2004 Posts: 1,897 Shop Shark | | Shop Shark Joined: Dec 2004 Posts: 1,897 | Or you might have to pony up for a 12 volt starter. Cletis is correct, you don't want to mix 6 volt starters with 12 volt flywheels. | | |
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