If you have the money stroke it to 500 inch, put an 850 carb on it, and you will be very happy. Built several for myself and customers. One was a 69 roadrunner, I ported the 906 heads, and it would run 10.90's with a 4.11 gear and a 2,800 stall on pump gas. If I remember right it was a .520 lift cam, 108 center and 235 or so duration, nice lumpy idle, but cleaned out well when you accelerated.