Ok cruising 60 i nail it... Great freakin pick up bug at 87-95 it begins to fall on its ass... Is this a shitty tune?

My truck is 03 5.3, kn cai, LT into ORY into Flomaster muffler, it is cammed 220/224 112 lsa with 3000 stall...

Any advise on what it is.. Or is it a case of just a shitty tune