Good Lord is it easy (so far). I have a totally clean 76 C-20 that I love other than the fact that it is a C-20 I got a 73 K-20 today with good drive train. It only took Me an hour and a half to remove the crappy old body, and that was doing it right no chopping or anything. The way I figure it should only take a total of 8-12 hours to complete the job. I'm gonna keep it basically stock and use it for a future tow rig for the Blazer. I probably will do some engine mods later on for more torque but the suspension will stay stock.