I had several sets of 906 ported and added bigger valves, 2.14 intakes and 1.81 exhaust. They average 266 CFM on the intakes at .600, the OOTB Eddy RPM flowed 284 at .600 valve opening on the same bench Thats 40+ HP plus the weight off of the nose of the car

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