I ran camquest6 from comp cams, using the following parameters:
3.97" x 3.31"
XE268 cam (1600 to 5800)
DP high flow intake
600 carb
Large tube headers
9.5 CR
308 head flow numbers (max CFM 207) with 1.88 / 1.60 valves
HP seemed just a bit high at 364
Torque was at 394
I then replaced the cam with a retro roller, XR268 (1400 to 5500)
HP jumped 30 to 394
Torque also jumped 23 to 417
And not just the peaks, but much higher averages and sooner with that roller cam. I was not aware it impacts torque so much. And yes, I know the program is a bit optimistic, but I think the difference between roller and not is much more realistic.
Fun program. I played around and increased bore and watched only torque go up. Same thing happens with increasing stroke, just torque.