Carb Tuning / Vacuum Problems?

Just so everyone knows: some of the noise is probably the fact that the driver's side manifold is leaking at the back of the head and also where it connects to the headpipe. Still doesn't sound good though.

bigdemo: It's hard to say but it seemed like it may have gotten a little worse as the trip went along. I definitely had a loose plug wire then and it wasn't running as well as it is now. Actually, aside from the bad idle, I feel like it's running about the best it's been since I got it once it warms up. It's never really run great, though.