I bought my '58 Apache 1/2 ton longbed about 2 years ago. The prior owner had installed a power booster/dual master cylinder setup under the floor; I think it's from Classic Industries. It still has drum brakes. The brakes are very touchy but I've pretty much gotten used to them now. I've thought about reducing the vacuum being drawn from the carb to make them less touchy and I might do that at some point. All in all, I think it's a good upgrade. You may need to modify the exhaust slightly to get around the bigger unit under the floor (mine's a 283 with dual exhaust).
Steve
