i have a strange pro housing with strange 33 spool and moser 33 axles i have the spool adapted for the big bearings and a sleeve on the pinion gear for the inside big bearing. it is a older unit from around 1996 and it will be the last center i buy. i can't imagine at the level i race at or could afford to go to i will ever brake it. and if i ever go race block and bigger bucks it is plenty.
the housing is a stock 75 merc monarch rear no mods. this went in my duster with out big bucks on someones custom rear.
i have a war housing i stopped using and was told by old timers that they are good but in the 9s they would not use them cause they seen the rear caps brake in the center where the bolt is installed to lock the adjusters.