That's kinda why I asked if any were being used on a track tested well sorted out race combo. Anyone could and can say well if I did this or I did that it would do this. Heck my 2850 pound pump gas (93) Duster ran 10.06@130mph last year with a 540 lift solid racer brown cam. I ported my Edelbrock heads in a hurry to get back out after my econo W2 heads cracked so they aren't anything special.