[sixty8c10]

here we go
1. yes, the parts from other trucks consisted of the front crossmember (the one underneath/ directly behind the radiator) and a floor hump both came from 67-72 GMC

2. When I put the 4wd running gear in the P/U I cut a hole in the floor to clear the T-case, and covered it with a floor hump from a 67-72 GMC. I left the 4WD shifter in the blazer its not in the way and its a good conversation piece.

3. I don't really understand what you are trying to say with the last remark...are you going to do a frame swap? 85 body to 81/ 82 frame then just turn your P/U into 4WD or what?