@COQP Welcome! It seems you've fallen into the mod trap!
No you don't have to re gear but it might drive like slug 0-60 compared to stock and you wont have the same torque in low range but it will still be fine for cruising on highway...but be prepared for your MPG's to drop to like 12ish-15ish city/hwy...it will go back up if you re gear though.
You'll deff also need to do a body mount chop to not rub at full lock of the wheel on u-turns, etc. and also hammer flat the pinch weld behind the inner fender wall as much as possible to not rub the wheel well at full flex on rockier/tougher trails.
I'm running 34" MT Toyo's, factory gx rims + 1.25in spacers w/ stock gears - my 0-60 pickup is sluggish but not bothersome and I had to do all of those things to not rub so chances are you will too especially if you will be running spacers or a wider rim which you'll have to do for 35's unless you want to squeeze them on the stock rim, but ideally you'd have something 8" or wider.
Once you do those things and get it properly offroad you'll see relatively quickly where it rubs most and what needs more attention from your hammer, grinder etc!