Here are the front / rear weights on my stock 53 3100 with no driver. I'm running a Frankland quick change with 12.88 Wilwood disk, Gleason Torson diff. I had Frankland (and Wilwood) make it so my mounting surfaces would be the same as stock. I also don't want to tub the bed. In most classes I'm limited to an 11.5" tire and want to run a 10" to 11" tire. I'm getting a price worked up now on widening the fenders 2" and having an inner fender liner made from donor fenders. If I have a tire come apart I don't want it to ruin my paint. I'll let you know when I get a price. My skill level is not that good to do it myself. I was very surprised that my truck was so well balanced. I have always been told that pickups were light in the back. With todays all weather tires I think I will be fine. I don't plan on "racing in the rain" which is a great book by the way. Thank you for your time.