[FB85C10]

i did a 8.5 10 bolt rear in my 1985 c10. i had it narrowed 11.5" and welded the tubes and replaced the 28 spline and upgraded to a 30 spline axle (88-up), i used moser axles, auburn diff. w/ LS and 3.73 richmond gears with the moser rear cover. i was told it could hold up to 600hp. i have not used it yet.