Hey Kenny,
I've finally made some progress on my CUCV wrecker. I went with a 480 and have swapped in a 205 with the stock TH400. I'm torn on actually figuring out the PTO stuff and going electric on the winches though. Electric would be simpler, but you lose fine line speed control. Decisions decisions... Oh, and do you plan to shorten the bed to 56" CA or are you lengthening your frame/moving the axle back? I paid a truck shop to cut, sleeve, and lengthen my frame then mount the bed, so it's not only proper length, but reinforced at the weak point under the cab where wreckers tend to crack.
If you come across any wrecker bed parts, let me know, I could use a few odds and ends. Might be interested in the repro bedsides if you have them made. The bottom edge of my bed is pretty chewed up. And I'll not complain about the condition of my bed ever again, seeing what you started with. LOL
Joe