I got both a '52 3100 with the old Stovebolt 6, and a '49 GMC 100 with a factory installed 261, and SM 465 4 speed at my shop right now. I'd love to have either one as my own.
I'd put a 453T DEEtroit, 5sp main, and 3 sp Brownie in it though.
I'd take one of these, too.