Steve, take a quick look up at my 390/410 cam choice thread. Basically looking for the same kinda deal in the motor I'm building. For hauling, you want the low end torque, and a nice flat torque curve. Think I'm pretty well settled on getting the Crane 343901. It has a pretty flat torque curve from 2-3500rpm and produces a little more low end torque than the others I was looking at.

I think Ratsmoker or Karl could run you some desktop dyno numbers if you had a cam or two you were thinking of. They'll need some information for that. Intake type, carb, head info (if they're cj-style, have they been ported and polished), things along these lines.