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Mind you, be sure you want to do this, as it's $$ and some time (and you have to pull the shafts on semifloats like your stock 10-bolt, grr) ... if you're thinking of upgrading, do the axle upgrade now, as the disc upgrade won't go onto a 14 bolt rear.
I still have all the stuff to do a parking-brake rear on a 12-bolt that I've never installed, as I seem to have put a 14 BFF (also disc) on the '74 I was gonna use it on.
Someday I'll update that article. It was never meant to be permanent. I never even proofread it. After doing 5-6 of these swaps on 10 bolts and 12 bolts I have some new info to put on it.