i went to a junk yard today and found a 14bff rear in a 1 ton chevy with a utillity box on the back instead of a bed. its a 2wd truck. i measured the springs center to center and it was 40". brake drum to drum was around 53" my 1/2 ton springs are 42.5 center to center, 55.5 drum to drum. i know i will have to move the spring plates. are the brake drums that much bigger on the 14b?