Originally Posted By StealthWedge67
For all those that call the modifications “band-aids”; the 9” units that most run are not stock Ford units, they’re full of aftermarket stuff also. For that matter, most Dana’s in this conversations are likely S60’s outfitted with Spools, aluminum covers, and aftermarket axles.

But once you've done those modifications to a Dana or a 9", you have a nearly bulletproof rearend.
Do whatever you want to an 8.75 and you're gonna still kill ring and pinions.

CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax