vacuum and AFR

something doesn't seem right to me. I have a magnum motor, stock compression, Eddie heads, RPM intake, 1.6 rockers, small cam .482/.496 duration 214/220 with a lsa 112.
The cam is ground for 1.6 rockers. Timing is at 14 degrees at idle, i am idling around 1000 rpms, carb is a csu (holley based carb) set up for a blower. I have a blower just not piped up yet because doing an inital start. My AFR at idle is 14.6 however my vacuum seems pretty low at 10 in hg, I thought it would be higher. I do not have power brakes, so I do not really have to worry about that..just seemed kind of low. Thoughts?
Thank you
Rob