Hey, So I have a 57 Chevrolet 3100 series pickup... I am in the process of rebuilding the brake system...and kingpins, and getting her up and running. So here is the problem... I guess someone replaced an axle Both rear drums are the same, with a center hole of approx 3 1/2 inches that the drum slips over a small "hub" on the axle flange. These are 6 lug brakes. The passenger side has a small "hub" that is about 3 7/8 in diameter so the drum doesn't fit flush on the axle flange. Off course I figured this out after I had the drums cut. Problem is I can't seem to find a 6 lug 11x2 drum with a center hole large enough.. Anybody know a source for a drum that will fit this axle? and wth did the axle come out of?