dual m/c and balance bar

[GM Muscle]

ok so i have a stock 69 camaro braking system, 4 wheel power drum brakes.
i have a set of 4 wheel disc off of a 2002 trans am and the adapter plates for the fronts to bolt them up to my stock drum hub. of course i know i have to turn the drum down to fit the rotor.
My motor is not going to have enough vaccuum to run the power booster right and i dont really like the looks fo all the lines and stuff on the hydro boost setup, so im opting for a manual daul master cylinder and balance bar setup. im guessing 7/8front and 1"rear? what should i go with using the discs? im trying to keep this car budget oriented so any input would help. ive seen a few cnc setups for like 300 or so but if i can just go to smilies and pick up some wilwood m/c's im only 1 mile away. thanks in advance.