[lnfletcher]

Ok, thank for all of the directions!
First, it did run well with this setup at one time, so this is a newer problem.
This weekend, I retorqued the intake, and replaced the dist and wires. Yes it does the same on the street as on the dyno. He was in third at 2000 when he was giving it WOT. The plugs have been replaced and regapped. Also, the ED AVS 650 is a manual secondary carb. I didn't want to go changing intakes until I figured out what caused this to start. I have thrown enough money at it already!
I will check the exhaust bolts when I get home tonight.
I may just replace intake and exhaust gaskets to be sure.?
Would the exhaust cause the stumbling?!

Thanks again guys!