Carter -- best advice is to do to the back as you do to the front (yeah, that sounded a little vulgar). I have wide tires now (the Corvette kind). See the size below. They should fit without rubbing, as long as your truck doesn't have any sag from age. If it does, you should be able to lift your truck an inch pretty easily.

Also, be sure to CHECK THE LUGS periodically, to ensure your wheels don't fall off later! In fact, I plan to have longer studs installed in my truck as soon as I am able.

Raph

 

Torque them to 100 foot pounds and recheck after 150 miles. Wheels dont fall off unless the threads are overstretched, which happens when the lug nuts are not properly torqued to spec. Or if they aren't torqued at all.