I use this one with my German Shepherd and it's holding up well. Also has the mesh area between the driver/passenger seat which lines up with the rear vents nicely.
https://smile.amazon.com/gp/product/B082WQRPDH/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
I've got a stock 80th JT and average around 19 mpg on my normal driving, mostly city with a little highway (55-60 mph) roads. Best so far was 24 mpg on a trip up that was all interstate and cruise control.
Second the suggestion for taking an off-road course if you can. I took a course in Virginia that went through the off-roading basics including gear selection and how to pick a line. Definitely worth it.
I did the training class with Overland Experts down in Orange, VA last month. Was like $200 but worth every penny. I learned what a stock JT can do and how to cringe when you hit a skid plate for the first time. Worth checking out.
https://overlandexperts.com/?v=893f26889d1e
I'd seen the camera on Amazon and the Z camera before. The Stinger one I just stumbled upon today by accident. Sadly their website doesn't give a lot of info on it.
I just took an off-road driving course in Virginia in my stock 80th JT, running the OEM Dueller AT tires. I was highly impressed what the JT can do in it's pure stock form and your Willys will be fine. Highly recommend finding a course to take and learn driving techniques.
Stock 2021 80th, hit 24 mpg over the weekend on a road trip to the middle of VA. Cruise set at 60 - 65 for most of the trip. Best mileage I've managed so far.