GrooveCityZ71

came across a 91 regular cab short bed with a bad motor. pulling the engine and putting a 350 .40 over edelbrock carb and intake, SS headers, 292 cam.. going to pull the trans have it built up and add a stall..


I'm wanting to put 38x15.50 tires on it and I am wondering if I can swing them with a 6" suspension and 3" body or should I start pricing a solid axle conversion? the truck is not being built to offroad so I'm not concerned with full suspension travel.


also what gears should I look at for this setup if I can make that tire size work?

GrooveCityZ71

nobody?

dknoerzer

4.56? I assume 4sp AOD trans? Check this guy out. I just googled ring and pinion calculator. The 4.56 would put your rpms around 1900ish at 70mph.

Randy's Ring & Pinion. RPM Calculator.

The closest thing I can personally compare to was my dad's last truck: a 04 dodge w/ cummins, he ran 4.10's with 35" tires and that was about right. Good for dd and towing, but again, that was with the diesel. Good luck and have fun.

GrooveCityZ71

I'm thinking 4.88's if I run 38" tires.. thanks thats a good caculator! decent price on gears too!


any insite on lift options?

fastnnuffrt

Rough country is the most reasonable and still good kit. They used to not drop the front box which put cv's at a ungodly angle but they fixed that in the new kits..

pewterliftedz

iTrader: (4)

i would go 5.13s with 38s. and look into full throttle suspension. they have stupid big lifts while retaining IFS
honestly i would start looking for a 14 bolt rear and dana 44 front and build a SFA suspsnsion.

dknoerzer

I agree on the 14 bolt. I like a little overkill for some peace of mind in my drivetrain. I would go dana 60 up front even personally with a 38 and a v8.

1989k1500

iTrader: (23)

I would do 5.13s or 5.38s for 38s.

I have 4.88s with 35s on my 89.

I dont think they still make OBS kits but I could be wrong.

1989k1500

iTrader: (23)

And you can probably fit 38s with 6+3 but its going to be stuffed and depending on the wheel width and offset its probably going to rub.

For reference mine has 35x14.50s on 20x10s with 4.5 bs. And 9-10 inches of lift in front.

ianclarkson55

If I were you, I would have been gone for 4.56 instead of 4.88s