I too have been thru this situation.
when we originally built the car I decided that the products and cost offered by the vendors for the brake booster and master cylinder were lets say un-necessary. I fitted a GM 7" booster and 1" master assembly used mostly for street rods. It costs a fraction of what the vendors are asking. The GM master works great especially coupled with SACC's brake upgrade kit for the stock rotors. Unfortunately once I got the car on the road found out that the engine did not always make the vacuum required. I installed an electric vacuum pump that I purchased from SACC. Scott if I'm not mistaken this is the fist one you sold. Any way the pump works well. Now the brakes work consistently well as opposed to sometime well and other times not so well depending on vacuum. The pump is loud but guess what my engine with the 180's is louder. So I guess it doesn't matter.
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