Originally posted by big bill:
The GM manual picture above shows a small dampner with a removable pulley. The one you have may be for a later model, if so the rear groove ran the smog pump which mounted down low and behind everything.
I would assume the picture is of a 250 and they would need the extra pulley bolted on to run the AC. Worst part about this is that alot of the parts I have I don't know what they came off of so what you are suggesting might be the case.
