Well I picked up a tune from RWTD.com and my mixture went really rich again. Buried the AFR on the dynojet again, then with the predator I pulled 4% of the 4k-7k WOT fuel... That ended up burrying the AFR until about 5.5k where it crept up and reached a maximum of 11.7 right at 7k. So I'm thinking my MAF is probably pegged The tune overall lifted my numbers from 465h/445t to 483h/454t. Still have that problem with spark blowout over 6k RPM so maybe I'll try out those NGK coppers at .034.