one thing that i have noticed is that you look at a 64 chevy pickup frame its just like the 67-72 frames the part between the rear end and front end is flat frame no curves that raise up or go down on a 73-87 chevy pickup the frame is kinda straight for a while but when it hits the back of the cab it goes down (the 79 GMC i have is like this and if i remember my 85 chevy is same way also) so you'd have to make a body lift to make the 64 body sit right like no body lift in back of cab and 2 in body lift in front now a suburban frame is flat all the way across from front spring hanger on the rear to the rear spring hanger on the front with in the next week i'm going to be sand blasting my frame and painting it then i will mount my cab and i'll post how that turned out when i finish but problem is that'll be a week or 2 weeks before i know so ya....
Nate


Link to my photobucket for pics of my vehicles
http://s238.photobucket.com/albums/ff17/OldIronChevy/