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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: Feb 2011 Posts: 19 New Guy | | New Guy Joined: Feb 2011 Posts: 19 | what is the simplest swap to update to more modern powetrain - currently the orignal babbit 235 and 4 -speed what's the biggest displacement / easy swap - Non V-8
50 chevy 2-ton dump
71 C-20 Suburban 402/400
72 C-10 Suburban 350/3-speed
| | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 |
1954-1963 261
Then, GMC 270/302
Then, maybe a 250 or 292 (I know nothing about that "update/upgrade").
| | | | | Joined: Dec 2003 Posts: 2,733 Shop Shark | | Shop Shark Joined: Dec 2003 Posts: 2,733 | I believe the Chevy 261 CID inline 6 is the easiest. It allows you to use the same tranny and mounting. It is also a full pressure engine and getting harder to locate but they're out there. | | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | Actually, the 54/55st 261 would he the easiest.
| | | | | Joined: Dec 2003 Posts: 1,144 'Bolter | | 'Bolter Joined: Dec 2003 Posts: 1,144 | With a 250 you"ll have to change engine mounts and move radiator forward will work with transmission, some later 250s have cable throttle you'd have to adapt that. | | |
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