There are much better sb cams than the mopar performance cams. The MP cams are old designs and cam design has progressed.
One of the Comp Extreme Engergy or Lunati Voodo cams would be a much better choice. Their fast ramp design makes much more low end power without sacrificing much on top.
I have a Comp XE268H (.224/
[email protected] .477/.480) cam in my 360 and it is producing approximately 370 HP (based on 13.7 @ 102 1/4 mile best) with a smallish 600cfm carb. The engine pulls hard from 1500 rpm to 6500 rpm.