Hi- I just bought an 85 Jimmy last week on ebay. I am waiting for it to be shipped here from California. I got a great deal on it. It is in great mechanical shape with no rust. It only needs a little interior work. I was really excited about it until gas prices spiked this week. I am not going to be doing any off roading and I will be doing about 90% of my driving on the highway. I was driving a 96 s-10 with the 4.3 high output. I was getting about 20mpg. I decided to buy the Jimmy because I got tired of having a vehicle I can't work on because of the computer system. Besides that, the 2wd doesn't do too well in the snow even with 500 pounds of sand in the back and the ABS system has been acting up. I drive about 300 miles a week to and from school. I am working my way through college and I don't have a lot of extra money to waste on gas. I am making a little money by selling my truck and I am trying to find ways to increase the fuel economy on the Jimmy. It has a freshly rebuilt 305 with 1000 miles on it and about 500 on a rebuilt tranny. It is all stock with 32x265x15 tires. I am thinking about doing some of the following: Narrower tires (it needs new tires anyway), carb spacer, dual exhaust, upgrade the distributor/ignition, upgrade air filter/air intake system. Any suggestions on what would give me the best bang for my buck and what things would make no difference? I would love to keep the Jimmy but if I can't get better than 15 mpg I will have to sell it and keep my S-10. I am afraid of what it will cost to feed this thing during the summer when gas is $2.25 a gallon. Thanks!!!