If you put a stock pulley on the balancer with out having the pulley/damper balanced IT WILL FAIL. There is a recent thread by someone who did just that and the pulley broke off of the damper TWICE!
Anyway, the damper is a piece of SH!T, once you remove one, it should be replaced. The balancer/pulley assembly is about $200 from Ford or you can get a BHJ for $400 and a set of under drives pulleys for about $160.
You won't kill the BHJ damper and the UD pulleys will free up some HP. They are both neutral balanced so there is no balance problems when installing.
Aaron
I have my old damper and pulley sitting in my garage, free plus shipping, but I have already removed the balancing pins from damper.