wow! Nice times! Since you are runing so close to near perfect air fuel ratios, here is what I would do.
Low boost (16psi) 50 50 mix denatured, half pump speed. Raise pump speed and boost together at 2 psi incremants.
Really try to stay with a 50-50 mix if you can. If you can't stop the bogging, try a 70-30.
Mr. URL uses the isoprophol through 2 nozzles, and he chews it right up. Maybe this would be a good starting place for you, since you are running so well...