Dyno numbers are great for a tool but take your car to the strip and compare it's trap speed to standard LS3 times and you will know if your car is indeed making more power.
2012 Ford Mustang 5.0. Brembo, 3:73s
2012 Challenger 392 auto 12:40s 112 stock
2010 SS, LS3, Cammed, LTs, NT05R,12:20s
2004 Redfire Cobra, Pullied & Tuned
1986 GT, Ed Curtis 347ci, 11:20s motor. 10:30s 100-hp shot