i dynoed my truck last week and it only made 384hp and 507 torque but the air/fuel was off the scale below 3600 rpms and now i have the delta chip with my friends tune on it and it made 410 and 537 with a perfect 12.2 air/fuel across the board. i have a 2# upper and 4# lower pulleys,intake,chip,xhaust,and ported and polished throttle body and plenum are these normal numbers they seem kind of low?