Thanks for the tips,
Yes it is power brakes and I would like enough engine vacuum to be able to operate them properly. Surprisingly the previous unknown cam only produced 10 inches of vacuum and it worked well but that was with a single 4bbl setup.

The outboard carbs are factory VS. and I already have the parts necessary to be able to tune them properly, the baseplates and the metering plate jet kits.

Your car sounds like a wicked setup. I already got my drag racing cars I want this to be a great cruiser but I want the idle sound of the 383 HiPo for reference for this setup