I will be done with my build soon , but undecided on gears . What gears are you FI people running. I have a 402 9to 1 cr with vortech ysi with 10 to 12 psi with mast (black lable) L92 heads and a g5xb cam. what gear would use in a 10 bolt till i get the 9" and what gear would u use in the 9" allso the car is a M6 thanks

 

Most super guys love 3.73 or 4.10 gears. with six speed not much reason to not run 4.10.

 

I'd say pick up some 3.23s and call it a day

 

Depends on max rpm and tire size.
I am running 3.73s, but that put me at 7400+ rpms in the quarter with a 28 inch tire.
I don't like spining my motor past 7000. I would change, but the 1/8 mile tracks are most popular down here.