If a guy can come up with a factory nodular iron case and upgrade to some Moser or MW 31 spline axles and spool you have a pretty darn tuff unit. I've run this same setup in a 3500 lb Super Street for many years and never an issue, also used the standard street gear instead of a pro gear. Same set of gears since 1990. This same setup was in the car in my avatar on that run and many more just like it.