A stock cam is nice for torquey driveability.
Typically you need to look for a cam with higher lift (generally goes with torque), lower duration, less overlap (lsa). A higher angle overlap (112 compared to 108) provides a broader range of torque/horsepower over the desired rpm, but even broader. The 108* will peak torque quickly and max out, but it isn't too good for idle quality.
Too much duration for low-rpm needs allows the airflow additional time to enter or exit the cylinder. For about every 10* of duration increase the powerband moves up roughly 500 RPM, and it also goes in the opposite fashion.
A custom cam is the best way to go of course.
The first link in my signature has several common camshafts and there basic specifications.
I see you posted the Comp Cam XE270HR-12
218*/224* - .544"/.544" - 112* - 1,800-5,800 RPM
I was also looking at that cam. What do you think about it?
It calls for 1.7 rocker arms, and I have 1.72
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