How big is the Dominator? We built a 447 and a 461 ci both with SB2 heads, both made more power and quicker ET the bigger we went, a 1250 was the fastest. For the 461 I have a 2962 Edelbrock with an adaptor, and a 691 modified for a Dominator. I did not get any usable info on the change, I broke a cam. Hope to get it together in the next month.