I have 33's on mine with stock 3:73's and a 6mt. It's a little sluggish off the line but runs ok at speed.
I'd like to go 35's or 37's but a re-gear would definitely be necessary at that point.
Here's what mine looks like on 33's
I've had a Bak X4s on my JT for almost 3 years now and it still looks great, has minimal leakage at the car wash or rain storms.
Got a great deal on it from @RealTruck which is a site sponsor.
Even works with my bed tent!
My JT is also a manual sport with crank down windows etc...
Ordered it like that.
I figured less bells and whistles =less problems later on.
Added Katskin leather seat covers for comfort.