RAMIFIED,
In all honesty you never really gave the drum brakes a fair shot. The addition of two oversized wheel cylinders (35ea), kevlar ss rear line (50) and a set of EGR carbon/kevlar shoes (180) will compleatly take care of your rear braking problem. And at a price that is just a little over 300 bucks, it is very ecconomical. From a engineering stand point, the drum brake set-up is far better then the disk brake set-up. The 3500 series trucks use 13. 5" x 2" shoes, that is a tremendous amount on friction area, and once the right wheel cylinders are employed, their true potential will be realized.