If your cruising it dont matter. If your racing 742 housing is got the biggest pinion shaft that can take a beating. But they cost more in my findings. I always had good luck with mopar city. I bought 2 from him at different times and I just cleaned them up and slapped them in and they are still working great. I think I paid $275 for a 2:76 open and I paid $375 for a 3:23 suregrip. This was a couple years ago.
-------- Original message --------
From: Derrickb81 <derrickb81@xxxxxxxxxxx>
Date: 6/1/19 3:56 PM (GMT-06:00)
To: 1962to1965mopars@xxxxxxxxxxxxxxxx
Subject: Looking for 3.91 or 4.10 center section
Hello all,