I Find this site to be THE source for info.I have an 03 LB7 and an 03 6.0L F350.I have done the same upgrades to both,edge attitude with Juice,4 inch exhaust,AFE intake.My Ford KILLS my GM and it is 800 lbs heavier.So I stacked my GM with a Bullydog and put a tranny and converter in and my ford still rules.What next ?

Sell the ford :D

Sell the '03, buy an '06 LBZ.

Look around in the LB7 threads...There are plenty of other options