I got a 9 inch here with 1,064 dia caps.
I bought moroso ujoint girdles, their larger in cap dia. The center that I have is an open gear with 31 spline axles. What is the dia of the caps on the larger ujoints?
Going to pickup new posi form Reider Racing this week, before Woodard. I'm just kind of wondering what this third member is before I scrap it!

You have a pretty much standard 9" rear. The U joint girdles Moroso sells are for the larger heavy duty joint. The heavy duty yoke is rare on OEM applications.
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Anyone can restore an old car, it takes a man to cut one up.