Do what I did. I got a 76 4x4 frame and pulled the spring hangers off and put them on my 61 4x4 frame. Now I can use any 73-87 suspension lift. That way i had the same frame, and didnt have to worry about the body. Check out this thread, its my truck. One more thing, its your truck do what you want to it.

http://67-72chevytrucks.com/vboard/showthread.php?t=333036


1961 k-10
86 c-20
02 duramax