I've slowly been pulling the parts together to get my 6.2 installed in the '79 Jimmy. It's beginning to look like it will be next spring before any thing major gets done. One item that has cropped up has been the axle ratios. The axle ratios on the truck have been a mystery as the axle tags were missing when I bought it. Last weekend I managed to find the time to jack up the front and rear axles to check the brakes, and while I had the drums off the back, and the calipers removed from the front axle I spun the axles to get an idea of what the ratio might be for this truck. It looks like the Jimmy has 2.56 axle ratios. Definitely less than any 3.00 or any higher ring & pinion. I'm thinking that while this might be good for economy with a gas engine, it might not be so good for a diesel. I have another truck that I use as my primary hauler and off road vehicle, so I'm not too concerned about off road performance, though I'd want to take it occasionally. This truck will be driven around town more as my daily driver, or for the wife's occasional use when she sees patients as a home health care nurse and needs four wheel drive because of the weather. Any thoughts as to good or bad with these gears?