Drop right in is limited to the early Chevy sixes like the 235 and 261. Almost drop right in are the GMC sixes like the 270 and 302.

After that the least modifications are probably the later inline sixes like the 250.

An inline six means you don't have to modify the steerng. That's likely to allow the least distruptive swap and mean it will be easiest to restore or at least make look stock.


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...