I'm cheap and now with the 3" body+add-a-leaf+leveling kit the bfg 315X70X17s on the stock rims look kinda small. i get a wee bit of rubbage at full lock now on the frame but thats all. think i could pull it off?

 

No, the rubbing on your frame will get worse. I'd suggest getting a wider aftermarket wheel, like a 17x9. This will push the tire out slightly which will help prevent the rubbing on the frame. It will also give the truck a more aggressive stance and make the tires appear larger.

 

first, why would you want to put 37s on a stock rim???? second, there is no way you will be able to fit 37s on your truck with just a 3 inch lift. and third, you wont only need different rims that are bigger you might need to think about the backspacing...thats what makes you tires stick out the most.