I agree with what Bruce is saying with the gear on the Hit......but
if you drop it from a 4.10 to a 3.70 and you got any kind of motor ( and by the sound of your et/mph you do).....that 3.70 gear is gonna run it out the back door pretty hard...and most likely gonna increase your MPH.
I run a 3.70 gear in a ALL NOS car......on Motor pass its a very mild hit..1.38 60 ft....but come the 300 ft mark you better have those grapefruits ducttaped real tight...cause it comes out of Nowhere and goes into a freaking TIME WARP.. :shock: ....we will not even get into the NOS pass.
i would trying Knocking timing out of it to begin with.....Good luck...
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Bjuice..
"I'M YOUR HUCKLEBERRY ! "