I have a 5.0 EFI with the Holley systemax II stuff. I have all the stuff they recomend plus some. Holley claims 350 flywheel. I had my Cobra dyno'ed 3 times and the best is 305 rear wheel hp. I'm building a 354 and will use the Holley stuff, 36 lbs injectors, plus a custom chip. I hope I can get close to 370 rear wheel. I HOPE! Parts have to be matched and everything tuned just right. I should have the motor installed by Dec and maybe dyno'ed by Jan. I can keep up with a 107 ci ( 100 hp & 100 tq ) Big Dog chopper but can't pass him. Maybe next spring.
Dwight
See yall in June at London