Set new engine up help?

Thanks very much guys but unfortunately i don't have a vacume guage. I found out where the gas was leaking from turns out the gasket on the rear float bowl or cover was not set in properly this was a brand new carb from Holley really a bummer I think I got the lemon made on Friday! Can you buy just the bowl gaskets or have to buy a whole kit?
I wish I new someone in the area real good with Holley's i could sure use the help rookie mopar guy :-)