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Click on image for the lowdown. 
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| | | Forums66 Topics128,034 Posts1,055,440 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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For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down with Ads! Again, thanks! | | | | Joined: May 2005 Posts: 8,878 . | | . Joined: May 2005 Posts: 8,878 | You need the 4BT with everything except the actual transmission, so the adapter, flywheel, and bellhousing from the GM chassis 4BT. Then a GM manual transmission bolts to it. If using an SM420 the bolt pattern is the same but would need to check the index diameter on the input shaft bearing retainer. The SM465 is 5.125" I think, and I'm thinking the SM420 is 4.937" or something like that? this can be dealt with one way or the other.
In reality an OD transmission is a good idea in most cases. So before getting wrapped up in using the original transmission consider it's usefulness in the newly converted vehicle.
Grigg | | |
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