Axles yes,.Dont know about housings.
Look in chevy high perf.mag. ads. Lots of places sell replacement parts for 12 bolts.
I called several today looking for 3 series carrier posi units.
OK,Igot up and went and got a mag.
Drive Train Direct---1-888-584-4327
Drive Train Specialests--1800-251-0628
Just a couple.
axles are yes, but I dont think they make housings (try Currie enterprises)If they dont make them it is due to the popularity (and superiority) of the ford 9-inch. There are close to a dozen if not more aftermarket 9-inch housings.
Strange Engineering and Mark Williams both make drop-out 12 bolt center sections that you can bolt into a 9" f**d housing, but I don't know of anyone making a complete 12 bolt housing. Several companies build 9" housings as a direct bolt in for the chevelle.
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