Are you using the really long ones which puts the carb. out over the valve covers? If so, I believe the original engines they were on had a torque peak of 2800 r.p.m. I suppose if you cammed for a peak torque very near that speed you would have pretty good results. Sounds like a candidate for a custom grind,and it's going to be a fairly tame cam. Lots of good folks here can no doubt spec. one for you.