Master cylinder?

[svr]

Ok here's the set up, 57 3100 pickup, 235 with T5 trans, C4 front and rear suspension with 12" stock 88 corvette disc brakes all around. Looking for a master cylinder with booster that will go under the floor in the stock location. Brackets and mounting I can handle ok. What size bore on the master cylinder will work best? Am looking at a 1" bore master with a dual chamber 8" booster or do I need a 7" booster for more room? I know I will have to have a disc disc proportioning valve and residual valves for both the front and rear with this set up. Have considered a hydra boost set up but am not very familiar with how they work. All thoughts and suggestion welcome. Thanks