Oh yeah, I tried the jack method too, but it just lifted the rear end off the axle stands. Maybe I should get all my buddies to sit in the back seat and try again.

I'm gonna go to this wrecker I spoke to on the phone. He said he has a bunch of Datsun diff's and rear ends, but they are only marked as Datsun. He couldn't tell me if he had a 1200 one. If I can find a suitable replacement, I'll just slide hammer the old one off.