Updated the first post. And I just wanted to post up a graph from when I added long tubes.
Green line is with 4.10 gears, stock manifolds, off road prochamber
Red line is 4.56 gears plus I added long tube headers and an off road x
Both runs were dyno'd on the same dyno, both SAE corrected, and both received dyno tunes by the same tuner (air fuel and timing were nearly identical).
Assuming the long tube headers gained me 12hp (which is common), I lost 3.8% due to the gear change.
So my numbers with should be closer to 326hp/322tq.
Other mods at time of this dyno:
E70 Tuned, Borla CB, 3" RAI, 90mm LMAF, XCAL3, 96 Cobra Intake Cams, NGK TR55s, various suspension and non performance related mods
