Cam Questions

right now a 5.3 with a cold air intake, tbss intake, 92 mm throttle body, 36# injectors, and longtubes. my current cam is a comp .554 .558, 208 212, 115 i called comp and told them that i wanted to make more tourqe and horse numbers they said cam with .566 .568, 222-224 112. is this cam much bigger cuz i want to go alot bigger than what i have now. with the new cam i want to get the stock heads ported to match the cam what can the stock heads handle.

If you're going to mess with the heads, then you'll prob want to get a cam with more lift to take advantage of the porting.