Everytime I connect up the brake booster, the engine runs crappy.
I disconnected it and it idles smooth.
I have them connected at the rear of the Carter with a tree, has 3 ports on it, one for the trans modulator, the other for the vac. adv., and the last one for the power booster.
I know I run at low vacuum around 13" to 14" at idle and I am running a 9" booster and when I disconnected the check valve I heard no air ruching..
Do I keep it connected or not?
Is it a bad booster? or what is it?

Sounds like you have a vacumn leak in fitting, hose or boaster.

I believe the vacuume connector to the brake booster is a one way valve. If you pull it off the brake booster with the motor shut off you should get a woosh of air sound.

rohrt I did that and I heard nothing at all. I had the ngine off when I did that.

check that plastic booster connector to make sure it still working as a one way valve.

A leaky booster would also get rid of that Woosh sound. Try capping the valve with your hand when it's running to see if the idle improves.