Big Cam No Vacuum

I agree with Lustle. Your cam ain't that big.

I realize you would have to redo a bunch of lines and all that, but you'd be far ahead of the game making it manual brakes. It's cleaner, and when done correctly it will stop much better. I have done it many many times. Starting with my first car. I always ditch the power brakes.
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Since I already have the pump I may as well give it a try. If it doesn't work I'll go to manual. Thanks!