Come to Nashville, or more accurately, about 65 miles south on I-65, and I'll let you take your pick of 1/2 ton frames, one 51 GMC, and one 54 Chevrolet, free! Just haul them away! The 51 has a complete straight axle, with hubs, brakes and wheels. I'm fabricating a frame from a Nova front clip and the back end of an S-10.
Your 3800 conversion is going to be a massive pain in the butt, with little chance of success.
Jerry