It seems to be better now. I was reading vacuum through a "T" on the line from the front of the carb to the pcv valve. Wasn't reading much vacuum until I pulled the line on the "T" going to the PCV and put my finger over the hole. Then it started reading A LOT better. I tried moving the screws in and out and it had some effect. I put some fresh gas in it. I have accell superstock plug wires that have been on there for probably at least 3 years. Would changing those to say Moroso be a really good idea?

It still seems lean as it hesitates when I accelerate, and I get the valves rattling. I thought pulling the vaccuum advance to you retards and towards the cab advances? It's an SBC.