My two cents. I have a 47 Dodge pickup. I removed the front steering and replaced with a Grand Fury k-frame. Power steering and power disc brakes. I installed a 360 with a 727. I got a rear end from a 64 Belvedere, 8.75 with I believe 2.91 gears. The 47 came with a 488 ratio.
If you don't have hub caps on, it looks like the original I am using the original radiator, steering column and wheel. Went for my FIRST ride today. Blew a power steering hose, it wouldn't shift into high gear and it doesn't seem to be charging. But all in all, great day.