66 c10 rochester 2jet carb HELP!

[billetproofcustoms]

something weird happening with my carb. It is rebuilt, installed, cranked it up last night without the road draft tube/pcv setup on it, (open port at the base of the carb) and it ran like a champ, good idle, etc.
Once i connected the PCV setup from the carb to the road draft hose, it will not idle, chokes out until it dies. I tried reversing the pcv in hopes that i had it in backwards, but same thing. but the second i disconnect the pcv from the hose at the base of the carb, it runs fine.

what gives??? I know I cant just leave the port at the base of the carb open..??