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BUSY BOLTERS Are you one?  The Shop Area
continues to pull in the most views on the Stovebolt. In August alone there were over 22,000 views in those 13 forums.
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Jul 21st, 2025 | | | | Joined: Jun 2016 Posts: 222 DLBrooks | | DLBrooks Joined: Jun 2016 Posts: 222 | Are there any problems with replacing a 1959 GMC 270 inline 6 with a 1953 GMC 302 inline 6? I purchased a 59 GMC half ton with a locked 270/3 speed and I have a chance to purchase a usable 302/4 speed sitting in a 1 1/2 ton grain truck 33k miles.
I will be purchasing rather cheap the complete rolling frame and running gear of which I only need the radiator if it fits, engine, and maybe not the 4 speed trans - have a spare sm420. But I may use the engine bell housing trans --not sure on driveshaft.
Does anyone have interest in the rest or part of the chassis? I should get complete steering and brakes also. | | | | | Joined: Apr 2005 Posts: 7,442 Bolter | | Bolter Joined: Apr 2005 Posts: 7,442 | The rules are clear, no selling or offers for sales allowed in the forums. Sounds like a cool project. Hope it fits. Others will be along shortly with answers to your questions.
Martin
'62 Chevy C-10 Stepside Shortbed (Restomod in progress)
'47 Chevy 3100 5 Window (long term project)
‘65 Chevy Biscayne (Emily)
‘39 Dodge Business Coupe (Clarence)
“I fought the law and the law won" now I are a retired one!
Support those brave men/women who stand the "Thin Blue Line"! Hug a cop!
USAF 1965-1969 Weather Observation Tech (I got paid to look at the clouds)
| | | | | Joined: May 2001 Posts: 7,440 Extreme Gabster | | Extreme Gabster Joined: May 2001 Posts: 7,440 | You will need to use the 270 bell housing, flywheel and clutch. | | | | | Joined: Jun 2016 Posts: 222 DLBrooks | | DLBrooks Joined: Jun 2016 Posts: 222 | Is that only if I retain the 3 speed? I want to end up with a 4 speed. | | | | | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | The mounts are different on the frame. You'll need to use the 270 bellhousing with either trans to properly fit the '59 frame.
Bill Burmeister
| | | | | Joined: Jun 2016 Posts: 222 DLBrooks | | DLBrooks Joined: Jun 2016 Posts: 222 | | | | | | Joined: May 2001 Posts: 7,440 Extreme Gabster | | Extreme Gabster Joined: May 2001 Posts: 7,440 | The big truck bell housing and flywheel are too large to fit under the small trucks. The transmission is the same for either. | | |
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