I had an 8” dual diaphragm booster on my 67 with a Baer track front kit and touring rear. The engine was making around 15.5” of vacuum. I was never happy with the feel of the brakes with this setup. It took more pedal effort than I liked. I probably could have benefited from the use of an external vacuum pump.



Based on the positive experiences of some on the board, I am trying a hydraboost setup. The car isn’t back together yet so I can’t give you a comparison between the two.