Hey Jack,
Be patient, no doubt lots of SBC engines put into early trucks. I will be doing the same perhaps over the winter. Just picked up a '45 2Ton farm truck yesterday ($100)
I have a built-up 350 with a 350THM trans waiting for a home. Am considering a IFS and newer rear axle. To be determined.
http://i837.photobucket.com/albums/zz296/BAFTUB/IMG_0429.jpgTruck now has the handle of "Gringo Loco" in honor of my loco friend Ken who brokered the deal and often goes by "Gringo". Maybe I will have advice early in new yr.
--Rick M.