Finally, I just purchased a set of 4.10 gears for my 72 GMC Jimmy. The rig came with stock tires and 3.73s. I installed a 4-inch lift and 33s and lost a ton of low-end. After rebuilding my motor I decided it was time to lower the gears so I was not getting robbed of HP and low-end from the increase in tire size. My loss of power was further compounded by the fact that I often pull a trailor and quads and found that my right foot was doing a lot of work on hills. I hope the gear reduction helps makes a noticeable difference! Additonally, I also purchased and will be installing a Detroit Tru-trac for the rear (GM-12blt) and a Trak-Loc for the 44 in front. Not true lockers, I know, but definitely better than open diffs! Also, this is my daily driver. What is best about this is that none of it would have been possible if I had not won a jack-pot at a local casino. I could not believe it. PS-I had to spend the money quick before the wife caught wind of things :-)! Anyway, I wish everyone a safe and great holiday season! Cheers!