General update...
Put together this 14 Bolt.
3:42 with an Eaton Posi installed.
Then I realized : DUH
Spring pad location and shock mounts need to modified in order to install it into a '72 and back application.
So... now I'm off to the welding shop to get a time to get this resolved then re-powdercoat the axle tubes after all is done.
I'm using this 14-Bolt for axle length comparisons prior to completing the HO72.