My 511 400 stroker motor with ported big valve 906 heads with 9.25 to 1 compression ratio with the low deck Eddy dual plane six pack intake and a set of 440 6 pack carbs made 612 HP at 5500 RPM with 644 Ft. Lbs. at 4500 using 91 octane CA pump swill, that motor ran 10.69 ET at 124.+ MPH in my old Duster. Changing the heads to a set of Eddy RPM CNC ported by Jeff at MCH pick the car up .29 ET and 3 MPH, upping the compression ratio by increasing the stroke .050 changed the deck height from -.025 down to zero deck height which change the compression ratio from 9.25 up to 10.29 to 1. those two changes help the car run mid 10.30 at 127 MPH.
The last change I did was to swap the heads and intake to a set of Indy SR M.W intake ports(bump the compression rtaio to 10.78 to 1 also) and a Indy 400-3 single plane intake with a 1050 CFM Holley Dominator carb which made the car run its best ever of 9.993 ET at 134.8 MPH at Woodburn drag strip in late July the year before I traded it off for my current S/P car
More air and more fuel make more power, simple isn't it
Many people on here worry about getting to much of some good things, I don't