Big cam with high(er) compression and a single plane intake on a street car is asking for headaches, especially when braking is concerned. There's a lot of things you can do to tame the motor (on your own or with suggestions from members here on the forum), my suggestion would be to switch to a dual plane intake to make it more streetable along with an appropriate cam. I've done this to my 383, 906 ported heads high compression 3 bolt mechanical roller with solid lifters and can stop at a red light without a vacuum canister.
You can play with it until you get it right (or give up), but it might be quicker to tear it down and do it right so you have what you want for a street car.