Skippy, you and I seem to be roughly at the same place on our restorations. Our trucks are the same except yours is a Chevy and mine is a GMC. I am considering repowering mine also. From what I have managed to read the major problem with going to a V8 is interference with the steeering column. I have seen plenty of V8 swaps where they changed steering or even put a more modern front clip(I dont think this is even an option on a big bolt). I would think that swaping in a 230-250-or a 292 might be the easiest, from what I have seen so far that swap would involve new front engine mounts and a bellhousing from up to a 67? Chevy/GMC Truck. One more problem both you and I have is the rear engine crossmember it changed in 54 to the more angled mounts.