I have had probelms with caddy callipers too.
I personlly woudl rather spendmy money on some other part of the truck, than the brakes, expecally when drums are so cheap. Your still gonna be a few hundred into disks, and then you have to get all the quwirks out. I say forget it, and spend the extra money on a lockright.
Its not like the brakes are that bad. I can still lock up my 35" on dry pavement with my stock 85 brakes.