I ran a mini spool in my stock 2.73 open carrier super hard for 23 years and only twisted the splines on one stock axle slightly once.
That included drag and street racing, flat towing, slicks, a 144 HP Pontiac151 with a 4 speed with a 7200 rpm limit and a 350 hp 425 Cadillac with a full manual Turbo 350.
That also included 3.42 and 4.56 gears at other times . Its only annoying around turns, lol
Pretty good for less than $100 .
Doug in P.R.
My Old Monza now lives in Arizona with its newest owner.
The 90's just keep rollin' along........
1990 Chevrolet Silverado Regular Cab Long Bed 350 TBI V8 700R4 118K miles
1992 Pontiac Sunbird Coupe 2.0 OHC MPFI I4 TH125C 157k miles