When I had my 150 on 37s with 4.56s I could roast them on command from a stop. But in your case with heavy 35s I'd go 4.10s.
34's and 3.55's put it on level 3 and i dont even have to try to get the tires spinning :] probably because my wranglers are wearing down
More likely because it's a one wheel peel on wet pavement. I have to really be trying to get mine to spin... but they are 12" wide, too. These y/m trucks only have a little over 300hp even with a few mods so they're not rampaging beasts by any stretch of the imagination.
get 4.56's with master install kits front and rear. call a damn shop where you live and see what they will quote you. we cant give a exact price installed, but the gears and install kit shouldnt be more than $750.
I don't like hearing that! I'm sitting between 88-89k right now. I need to at least get this thing paid off before I have to put any money into actually fixing anything.