I have vacuum power brakes with a booster and I added a canister to help with supply but it just didn’t cut it. I changed over to an electric vacuum pump but it wasn’t adequate either. Today I thought, why not ask you guys, which I can’t believe that I haven’t to this point. This problem has haunted me for years. The cam is too big so I was wondering if a brake pump such as in a diesel might work. I have a S-15 Jimmy with a sbc in it. I use the V- belt and I really don’t want to switch over to a serpentine belt, I tried it and they kept flipping off. Does anyone know if a belt driven pump would work and if so, which Chevy diesel do I look for in the bone yards? Thanks.