I've been doing alot of reading on the subject of power. I have an 88.5 samuria with a fairly healthy 1.3 (no smoke,small leaks and no raps or knocks) I have an open air cleaner 8.5mm wires, nkg platnium plugs,msd blaster2 coil an 2" exhaust. But I'm running 31" bfg all terrian t/as looks good, but I have trouble climbing hills, downshifting once, maybe twice depening on the hill. I guess I need gears to help with the tires. This is my daily driver I don't plan on running anthing larger than 31s can I use 4.62s or would 5.13s be a better choice??90% of my driving is on the road.

Check out the T case gears with a search. It will be cheaper and easier.

I like the 5:13's but for you the 4:62's probally would be a better fit for you. Check with Skyhiranger... he has both for sale. Ask him what he thinks. I'm sure he will give you a meaningful answer and help you with your decision.

 I have been talking to skyhanger at 150 a set I wanted to see what everyone thought. I only want to do this once.

 Make that skyhiranger sorry about that.