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| | | | Joined: Jul 2006 Posts: 707 Shop Shark | | Shop Shark Joined: Jul 2006 Posts: 707 | This project is under way - to be running by the truck's 60th birthday - and I know there is information to be gleaned on this board, on this subject, but I guess I am no darn good at searching.
The first question I have is, are there mounts available for this swap?
1951 3800 Be the change you want to see. -hotshoe
| | | | | Joined: Sep 2008 Posts: 137 Wrench Fetcher | | Wrench Fetcher Joined: Sep 2008 Posts: 137 | Don't all the 216/235/250's have the same mounts? The 292's are different (offset), but I thought the others were the same, even up into the 80's. | | | | | Joined: Oct 2003 Posts: 5,152 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Oct 2003 Posts: 5,152 | Don't all the 216/235/250's have the same mounts? The 292's are different (offset), but I thought the others were the same, even up into the 80's. The 230/250/292 are all different bellhousing and side mounts from the 207/216/235/261 motors. The GMC 228/248/270 and 302 motors complicate the picture a little more... Canadian built models make it even more complicated. What truck do you have and what motor are you dealing with?
1955 1st GMC Suburban | 1954 GMC 250 trailer puller project | 1954 GMC 250 Hydra-Matic | 1954 Chevy 3100 . 1947 Chevy COE | and more...
It's true. I really don't do anything but browse the Internet looking for trouble... | | | | | Joined: Jul 2006 Posts: 707 Shop Shark | | Shop Shark Joined: Jul 2006 Posts: 707 | I have a US-built 3804, a 1951 one-ton pickup, which is getting a 1981 250. The engine is from a fleet-spec 1/2 ton. A 1981. Sorry, I thought that was clear from the title.
1951 3800 Be the change you want to see. -hotshoe
| | | | | Joined: Oct 2003 Posts: 5,152 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Oct 2003 Posts: 5,152 | Sometimes follow-up questions need to be asked to help other posters understand the context. That was the case here as far as I'm concerned.
The series of motors that includes the 250 all use the same bell-housing pattern at the rear and mostly the same engine mounting. The 292 is a little different so we'll ignore it for now.
The 250 can be mounted where the 230 came out and actually the engine mounts and bell-housing are the same as a side-mount Chevy V-8. You don't have to worry about the steering because the motor is narrow like the original six, and the mount kits you can buy for a V-8 make the swap straight-forward.
The mounts are completely different from the early Chevy/GMC motors.
1955 1st GMC Suburban | 1954 GMC 250 trailer puller project | 1954 GMC 250 Hydra-Matic | 1954 Chevy 3100 . 1947 Chevy COE | and more...
It's true. I really don't do anything but browse the Internet looking for trouble... | | | | | Joined: Jul 2006 Posts: 707 Shop Shark | | Shop Shark Joined: Jul 2006 Posts: 707 | But I'll need the 250's bellhousing because the 216's won't work, right?
Will I still be able to use the stomp starter? How about the drum on the back of the old tranny?
1951 3800 Be the change you want to see. -hotshoe
| | | | | Joined: Oct 2003 Posts: 5,152 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Oct 2003 Posts: 5,152 | But I'll need the 250's bellhousing because the 216's won't work, right? Right. 1980 might not be the ideal choice but you will need a post-'54 Chevy V-8 type bell that bolts between the transmission and the block. Will I still be able to use the stomp starter? I hate to label things impossible, but without some modification and fabrication you won't be able to use the stomp starter. How about the drum on the back of the old tranny? Should be no problem.
1955 1st GMC Suburban | 1954 GMC 250 trailer puller project | 1954 GMC 250 Hydra-Matic | 1954 Chevy 3100 . 1947 Chevy COE | and more...
It's true. I really don't do anything but browse the Internet looking for trouble... | | | | | Joined: Feb 2004 Posts: 29,836 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,836 | Will I still be able to use the stomp starter? You can fabricate a fake stomper that will appear normal to the casual observer. The project involves a push-button starter switch mounted below the floorboard and the top part of the stomper pedal attached to a hinge or sleeve that allows you to push the button with your foot. The pushbutton is wired between the ignition switch and the starter solenoid so it's hot with the ignition in the "on" position, just requiring a push to complete the circuit. Jerry
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| | | | | Joined: Jul 2006 Posts: 707 Shop Shark | | Shop Shark Joined: Jul 2006 Posts: 707 | All useful information, thank-you both. Last question: OldSub, you say 1980 may not be the ideal choice of bell. Why?
Last edited by hotshoe36; 07/13/2010 9:12 PM.
1951 3800 Be the change you want to see. -hotshoe
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