I have only heard good things about s-10 rearends, I am looking for one now , I went to pick & pull last week to check them out , heres what I got , there 5 ft. wide , and they all seem to have aproxamitly 3.70 gears . All the ones I looked at where 10 bolt, I heard around 1992 or so they went to 9 bolts , there suposed to have larger ring & pinions. Thats I know for now , I will be putting one in my 41 trk. , soon.