i want to upgrade the rear of my '78 lt to 3.73 posi and i was told a good place to find them would be in an old s10. i've got 2 rusting away out back but when i tried to get the codes from the stickers they were gone or not legible. does anyone out there know anything about s10 rear ends? one is about an '88 or'90ish Durango 4.3l auto 4x4 reg cab and the other is an s15 high sierra extcab 2.8l 4x4. i think the high seirra has the tow package, what kind of gears would that have? thanks

 

I think alot of the s10s were 7.5 rears.