You have 33s now. 35s will fit. You'll need a 1/4" spacer to eliminate rub at full lock. Unless you upgrade your wheels to something w at least a zero offset. As for gearing, there are plenty of ppl running 3:55 gears without issue. 3:92 gears would be better. Check your build sheet to know for sure what you have. If you don't have your build sheet, you can ask Chrysler for it.
285/65/20 BFG TA KO2s, Bilstein 5100s, Solid Fold tonneau, Rhino Liner, Husky Weatherbeaters, Magnaflow 18 muffler, Mufflex 5" tips, Carbon wrapped interior trim, Chime delete, Britax baby seat...