Trying to get the '70 Duster with a warmed 318 sorted out. The first tests runs were kinda scary - practically had to stand on the brake pedal with both feet to get it to stop.

This was originally a /6/904/7 1/4 car. I had done the front disc conversion many moons ago and the brakes worked great before swapping in the 318.

The 318 ain't nothing radical - 600 cfm eddy on a performer intake, kb167's, lightly ported J heads shaved .030", reground factory roller cam: 210@50, .428" on both intake and exhaust.

I'm getting a steady 14" of vacuum at idle...how much do I need to be able to stop this thing without having to change my shorts after each test run?