Me thinks 4.0 stroke with a 4.070 bore(EDITED blush) = 416 C.I. shruggy
The last race 471 C.I. BB I built and dyno made 720 HP at 7000 RPM and was still gaining 2 to 5 HP per 100 RPM, the customer swore he would not rev it past 7000 RPM so he had us stop their shruggy
HP is not hard to make, paying for it can be work shruggy

Last edited by Cab_Burge; 10/18/17 12:20 PM.

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)