I recently bought a 1990 Jeep Comanche, Has a 4.0, 5 speed standard, 2wd. Not too sure on all the particulars of it, as I am new to jeeps. What kind of upgrades do you guys recommend? I'm going for usability, and fuel economy mostly. I have a bigger truck to pull heavy stuff but I'd like to do some towing with this (only a small trailer, max of 1400 lbs). It's not going to be used for off road, mostly just will see highway and gravel roads. I currently have 225/75 R15's on it. Should I be looking at going with a different size? Any help is greatly appreciated!