The Stovebolt Site Forums The Shop Area Engine Shop subject: engine swap again

I want to put a newer 235 in my 46 suburban. Are there any limitations with the years I can use to be able to bolt right up to my 46 4 speed. Any thing else I need to look out for. I have an engine I may try to use but it may be beyond even rebuilding. Otherwise I will be looking.
Jim

I'm getting ready to put a '55 235 into my 1940 GMC with original 4 speed and bellhousing. I think any 55-62 235 will work.

There are several good 216 to 235 swap articles on the net that explain it pretty well. In your case, it should be a straight bolt in job.

Steve

Installing a 235 in a 46 is almost a drop-in, you'll need to use your 46 bellhousing, clutch and go to a short shaft water pump. That's it, go for it you won't reget it.

George

I think the only mounting difference from one GM truck gearbox to another would be the pilot hole in the bellhousing needs to be bigger for the later transmissions.you won't run into that problem until probably the late '60's transmissions though. Bedides,going to a newer engine,the pilot hole would be bigger than needed,if anything,so you might need to make a shim to fit around the front seal retainer on your stock tranny,and to fit the inside diameter of the newer bellhousing.I'd have it cut to be a tight fit onto the seal retainer,and install it with a little red Loctite. While you're in there,why not replace the front seal;cheap insurance,might save a clutch.