Nice numbers. You have a strong truck. My buddy had an 03 with a 6lb lower, no other mods and made around 425RWTQ. I think the HP was 395. I had a 00 Lightning that was stock minus a Flowmaster cat-back and open K&N. I had a strong truck too as a freeway race was VERY close, but prolly cause I had the old 3.55's and his 03 had the 3.73's. I miss that L. Sweetest truck ever built.