who did your tuning? you should have def been at 475-479 with that setup, now put on a 2lb lower and 100mm idler and you will be over 515 easy, i have same setup as you almost except for ford headers had them, they always leaked went full bassani and i have a shot of giggle now and then and make 575, what was your a/f ratio and waht kind of tuning did you use come to jersey and ill get that bad boy into the 550 club and in the 10s