We swapped in a 5.3l in my buddies 98 camaro V6 car. We used a 98 camaro ECU and harness. We also used a ls1 intake, injectors, TB, Maf, fuel pump, and regulator. It has a constant 58 psi and starts right up. Ive redone the vacuum lines and also capped the evap and pcv lines to try and figure out the issue but at wot and cruising it has no power and is very sluggish. Ive used the stock camaro tune, a 5.3 truck tune, i've tried to retune it myself in open loop and still have had no luck at all. Is there something missing that we need to do? Im sure its something simple that we have overlooked but we've been beating our heads around this trying to figure it out to no avail.

Here is a log and tune. Tune 4 is my tune and the stock tune is the original tune on the ecu.
seth log 1.hpl LOG
1998 Camaro tune 4.hpt Tuned
Stock 1998 Camaro tune.hpt Stock