Hey Duane,
Nope no vacuum assisted brakes or leaks. We have really done a lot of testing lately. The problem is most definetly the carb/cam set-up. I called Demon to double check the combination and they had said pretty much what I had heard from Don. With a lift of 560 and duration 244@.50 I set my self up for problems at low RPM's. It's not just the carb however, my timing and coil do need to be a slightly better caliber to handle the idle to WOT of a cam like this. I did think I could get away with a jet and/or power valve change, but the internals on the Mighty Demon are more suited to this set-up. I also have to compensate for a 1/2 spacer under the carb which we needed to make everything in the turkey pan fit. Yes, the floats were way to high at first, but we have run the whole level range without success. I had a Barry Grant tech on the phone one evening for an hour and a half. Can't wait for that phone bill LOL. Anyway, I will keep you up to date. Thank you and everyone else here at CC for all of the help.
--Mike