Unported head quickness?

The first motor I had in my D50 was a 2000 360 Magnum , 9.5 comp stock untouched magnum heads and a 501/513 hydraulic roller. It had really restrictive 2.5 block hugger headers and Mopar M1 single plane intake with a 950 Holley.
Ran a best of 7.27 @ 95 in the 1/8.