[tbrown5079]

Thanks for all the good advice. To be more specific, I purchased a nice kit that was perfect for what I was building. It has the under dash bracket, pedal, 8" booster, master cylinder with proportioning valve all together, It is disc drum. The rear is out of a 71 Chevelle. I always have brakes and the pedal is never spongy. It seems like a vacuum issue, but I have 20" of vacuum at idle. When I first start it, the pedal drops as it should. But when I start driving I have no power brakes. As I drive and use the brakes the booster starts to work. I have already sent the booster back twice. The first time the reservoir was clamped crooked and the second time the booster was bad. I just want to try changing things out one at a time to logically diagnose the problem. Today I got a 9" booster from an S10 so I will try that tomorrow. Once I figure it out I can get on the supplier to get me what I need. Thanks for your help. Tbrown