damn man, that is hard for me to believe. (not saying your lying or anything)
is this an auto or a stick?
if an auto, i say 4.10 w/o question. (personaly opinion)
and i would consider them for a stick as well.
if not, 3.73,,,, no less.
crossing in third???? @ only 4000???
that still baffles me.
maybe try shifting a 5000 and see if it helps your times. if not, than mess around with it at different points and see how it works.
that is also the first time ive heard anyone call a 306 a stock motor.
Q
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Quin, 87 GT,306,forged/cut pistons,edelbrock head\intake,steeda#18cam,1.7rr,MSD Blaster tfi coil,A9L,pro-m75mm,24#inj,accufab65mm,2.5"pipes,hooker headers,dynomax exhaust,3.73 gr,110 lph fp,moroso cold air,ASP pullies, weld rims
See my engine on user rides.
I see your shwartz is as big as mine, now lets see how well you handle it!