I would like to know what size the booster was for a 68 350 car with auto trans? ALso, what did the correct master look like> were to boosters plated the gold like the GTO's? ALso, I believe I had my master rebuilt and it's for the 67 as it has a flat top with a single center bolt to hold the cap. If I wanted to get a correct booster that's plated, wh has the best price? and what about the same for the master? Resto magazines want big dollars for parts that can be bought local if I only knew what to look for. Thanks you all.