Just picked up a '91 wrangler, very stock. 4cyl 5spd
The fuel mileage is better than my old F250, but I am wondering what can be done for even a little boost.

I also want to put a high back seat in the back for my children. I am going to put a hard top on it as well, unless I run out of money first, which is very likely.

Any other suggestions are welcome, thank you, R

Swapping the rear seat should be approached with caution. Essentially, you need to provide increased mounting support as a replacement would not match to stock mounting.

Your mileage will vary as you add weight.

And, tire and gearing will change your mileage. There are numerous rpm calculators that will help decide on tires and gearing.

What I did.. My 01 seats seemed low for me. I placed my hand over my head and touched the hard top and decided I had plenty of room up there to raise my seats.
So I had on hand some 2x2x1/4 which I sawed into lengths of 2 inches. Then I drilled a proper sized hole in the center of all of them. I took one of the extracted bolts to Tractor Supply and purchased their HARDEST, STRONGEST bolts 2 inches longer than the factory ones.
Now I have my seats 2 inches taller and they are MUCH more comfortable to sit and ride in.
An added plus is it is a lot easier to SHOOT out the window from the taller seats....
Big JIm <img src="/forums/images/graemlins/cheers.gif" alt="" />

Thanks guys, I will look into all of the suggestions.

I like Jim's solution - simple and effective.

I have a 94 YJ that has been through several generations of suspension mods before ending with a spring-over. It has not been a simple solution and not recommended for the average jeep owner. However, it is a great trail rig.

I have a 2010 JK that is 4x4Wire project vehicle. See more at: http://www.4x4wire.com/index.php/easyblog/entry/131-ats-stabilizer-install

Enjoy your jeep and ask about the mod experiences.

I guess I did not explain well enough, I'd like taller back back seatd for better head restraint in case of a rear ender.

The primary concern is mounting the seat (or seats).

The factory seat has fixed anchor points that are reinforced. Putting in a high-back bucket seat means you will need to provide for new reinforced mounting points for the seat bracket.

Then, you need to ensure that the seat belt points match the seat. The upper shoulder mount is high enough and the belt should be be long enough to use.

Stepping into some arcane legal points, your desire to provide better head restraint is noted. Now, in the case of a rear-end collusion, should the seat come loose or should an injury still occur, you could face lack of coverage for modifying the factory design which has undergone specific tests. Your mods could nullify your insurance.

Again, your idea is possible. As you are modifying factory designed, do it right and provide for new reinforced mounting points.

Seat belt extenders (and new seat belts) are available. Check http://www.omix-ada.com/ for detailed parts availability.

You may be able to start with the factory front seat brackets as your new base.