A number of dimensions and parts appear to be similar or the same between a 3800 and a 4100.

I don't own a 4100 but do have two 3800s and both a 4400 and a 6400.

Some parts are very similar in appearace, and like I said already, I think there is some actual crossover on some parts in some years of 3800 and 4100. I draw that conclusion from stuff I've seen in restoration pack pages.


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...