Your not gonna see a 100hp difference from the
set you have on the car to the ones that were
on it.. I was running a W-9 with step headers
(1 7/8-2-2 1/8.. if your conv stalls at 7000 it
is real close I stalled at 5600 and it was a bit
low.. I shifted at 8200 rpm.. it didnt make any
more power when shifted at higher rpms.. I went
up to 9400 and dint do a damn thing