The 400 small block is another externally balanced motor.

And they are not easy to find. They are not cheap and finding one a used one in a wrecking yard may be impossible.

A 383 stroker crate motor might be good compromise.


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...