30 rwhp for 350 is a bargain IMO. Not many if any other mods that will net you that amount of horsepower per dollar. A 10# rwtq loss is neglibigle and pales in how much you gain up top where it will improve trap speeds.
When i had mine ported i gained all around, dont have dyno numbers but it was a different truck after the port. It seemed to pull so much harder all across the band