Very sweet lookin' ride! I'm with you, the 60's are kinda slow. IMO, with the long duration of that cam, it's going to favor higher rpm. I'd say it needs more gear and higher stall speed. Say around 4.56-4.88's and 5800 stall. I know that tunnel rams look cool, but I'd go with a single 1050 Dominator on a 454R......
Johnny