I have not ran this motor set up this way in the car yet, it ran a best of 10:34 at 128.6 MPH with the Eddy RPM heads and six pak set up on the same short block with the same cam The last time the 518 was on a engine dyno it made 718 HP with the six pak and 708 HP with a team G 4500 intake with a Holley 1050 Dominator, possibly the same one that now makes 775 HP with the 440-1 heads and 400-3 intake That should make the car run low tens on a good day, I hope