I've had two motors that made close (526 C.I.high compression bracket motor 440 block that made 845 HP on race gas and 518 C.I.,10.78 to 1 comp. ratio 400 block 775 HP on pump gas Both motors where dyno tested on a DTS engine dyno in Klamath Falls, OR which is at 4300 Ft elevation, I don't remebmer the uncorrected numbers now but the pump gas motor ran faster,9.993 at 134.+ MPH through the full 3 inch exhaust on Oregon 91 octane pump swill than my 3450 lb Duster was legal for ) to your goals with the same set of 440-1 CNC ported by Jeff at MCH. That set of heads had the 2.250 intake valves and the standard size ehaust valves, those heads flowed right at 370 CFM at .700 lift. I'm building another, better, 400 block 518 C.I. bracket motor now with a vacume pump and a set of CNC ported 440-1 with Jesel paired shaft rockers, I'm hopng it will make real close to 900 HP on E85 with one carb.