Welcome to the Stovebolt
I'd get it running and stopping so I could drive it around before I make any decisions on swapping the drive line. You might enjoy the slower pace of driving an antique truck!
The truck was built to run on roads that had max speed limits of 50 mph. Trying to make it run faster will involve new brakes, suspension, steering, engine and transmission upgrades. There have been a lot of nice old trucks torn apart only to end up as unfinished projects because the owner didn't factor in the high cost in time and money to finish the job. Installing the cab on a modern chassis can be done, but you'll find the cab is very narrow and won't just drop on any frame without modifications.
Mike B
