TBI is more of a pain in the a$$ as far as i'm concered. i don't trust computer controled vehicles. your computer could die anytime and you could be SOL on the side of the road in the middle of no-where. it is also harder to diagnose computer problems in vehicles.

 

My 88 tbi 318 does pretty good for a stocker with just dual exhaust and 3.92 gears and can spin 295 50 16 tires.

 

I just took my dump bed out, and its raining today. Gets pretty slippy without that extra weight. Spins a one legger pretty good.

 

so do you guys think i should re gear my truck to account for the 31's? if so what gears would be best?

 

mabe you should go to the dealer and find out what gears you have first.

 

im pretty sure from what i have read that my truck comes with 3.55 gears but im not sure if they are any good with those tires.

 

Comes with as a default, maybe. But there were plenty of options. Do you have a build sheet anywhere? You can try a free online vin decoder. I know there is a marking of some sorts on the back of the diff casing too.

 

ok well im going to check it out today and see what i can find

 

The dealer will decode the VIN but the truck is 22 years old. The rear end could easily have been swapped out at some point.

 

pre TBI trucks are usually 3.55, most TBI's have 3.55 posi's ........... i just priced out making my 318 into a 372 stroker for $3000 less labour.... if you really wanna spin them get a 360 crank, 360 rods and some 340 pistons....than with a stock top end and those parts you'll make at least 400 FT.Ib's of tourque...then you'll spin them