my 505 made 692HP at 6300 RPM on pump gas, 10.5:1 and a ported dual plane Indy Intake w/ a 4150. Heads were mildly ported 440-1's and I'm using a custom roller cam that's fairly tame. Peak TQ came in at 5300 RPM. This motor is for the street.

With a single plane and a dominator I think it should make QUITE a bit more....I think the AndyF motor is a less expensive way to reach the same result...