Numbers a little low???

The next run it pulled 401 rwhp and 375 rwtq at about 12.5 A/F. (which I thought could have been leaned out a bit more to around 13.0 being a NA motor and all) Is it just me or should a LS1 equipped with GTP stage II heads + Torqer V2 cam + Longube/ Cat Y+ Ls6 intake + ported throttle body be putting down a little bit more than that through an M6? I was shooting for around 420ish, I suppose 19hp/tq isnt too far away from my goals. There was no before dyno to compare to unfortunatley. All the work was completed at one time by a good buddy of mine while I was overseas. Comments/opinions welcome. Ill post the Vid of the Final pull as soon as it finishes uploading to photobucket.
-Zach

