Do the 10s and 20s use the same frame? Is a two wheel drive frame the same as a four wheel drive frame with different hardware on it? I have a 69 C10 4x4 long bed that I am putting eight lug Dana44, and 14bolt FF under, with 52" springs up front and 56" springs in the rear. I have found a 70 GMC 25 2wd that is really straight inside and out. If the 10/20 frames are the same I'll just swap the body out. If the 20 has a stronger frame, and the 2wd is the same as the 4wd frame I could put all the drive under the this GMC. I will have to move all the spring and shakle hangers anyway, so..... Thanks, Jimi ANYBODY???