Pinion Nut size

[slpfeife9651]

I have to replace my yoke and that requires taking of the nut on the pinion bolt and my impact sockets aren't big enough. I need to know the size of that nut so I can buy one. I have a 1979 chevy malibu 2 door stock drivetrain, and the nut is big. Bigger than 1" socket or 22mm. So any help would be appreciated, thanks guys!
-Spencer

 

[SSedan64]

I think it's 1-1/4" or 32mm.
Best to uses a new Nut and Thread Sealer on Pinion splines & Thread Locker on threads.