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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!
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| | | | Joined: Jan 2009 Posts: 175 Shop Shark | | Shop Shark Joined: Jan 2009 Posts: 175 | I have a column shift 3 speed that has been cobbled up with a floor shifter and want to put in a floor shift 4 speed.My question is; what will I need to change over other than the gear box and floor pan?? I have a 61 chevy 1/2 ton with a 235 6 cyl and the donor is a 62 gmc 3/4 with a 305 v6 | | | | | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | The drive shaft will be the biggest problem. Take a hard look at the 2 trans. & the length. Check with a local drive shaft shop. They can probably mate the one from the 4 speed to the back part of the 3 speed. Have you check out the 4 speed. Most of the GMC trucks used the NP trans. It can be identified by the aluminum top. The early ones back then were notorious for busted syncros.
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | | | | Joined: Jan 2009 Posts: 175 Shop Shark | | Shop Shark Joined: Jan 2009 Posts: 175 | Ok thank you very mutch for yor help, This GMC was a camper special / never had a bed, would that make a difference in transmissions possibly a heavy duty? So your in Lenexa huh? I'm origonally from Topeka, small world. | | |
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