Thanks guys for all the suggestions. I don't have power brakes, so that's an easy one.
I have taken the PCV valve and hose off the intake and plugged the nipple. While this did change the idle speed, the miss was still there.
The vacuum running to the timing advance canister is ported and is working correctly.
Since the miss is in two adjacent cylinders, could the problem be associated with the head or head gasket, eventhough I have good compression? I'm still betting it is a vacuum leak that I can't find.
Thanks for all the help!
