It will be vacuum booster. No idea on amount of available vacuum, as I am still building car, and buying lots of parts currently. Engine is a ly6, but has a Mast camshaft, so vacuum at idle is anyone's guess. I haven't started car yet.
I found some formulas on Wilwoods website, and Baers websites, and doing some math, I come up with just a tad under 1 1/8" for my bore sizing, but there are other variables out there, such as those suggested by you guys, that will affect the outcome of this, and that's why I'm asking for help.
Thanks for the replies!
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