Hey guys,
I was planning on using a brake booster with my wilwood disc brake setup on my 70 chevelle. However I just found out that I am going to need 18 lbs of vacume. I am going to be putting in a 502 ramjet, will this supply enough vacume for a brake booster?

you sould call summit or jegs and ask them, they will pass you off to GM performance usually and you should ask them. My guess is that it should supply enough because the 502's dont have "that" aggressive of a cam profile. They are suprisingly driveable with good power