Very Low Vacuum

512Stroker said
Big cam equals no/low vacuum
You can adjust the carb and timing all you want, you may get it to come up a couple of inches but you will never see vacuum like a stock engine creates.
How much vacuum do you need? And what are you going to do with it?

I don't expect much vacuum. I thought I'd see more than 3", though. No power brakes, nothing that needs vacuum.