I was right...one snuck by me.
When I installed the Quicktime bellhousing, I re-used the trans mounting bolts I'd used with the reproduction 621 bellhousing that was in the car before. They are 1/2-13 X 2" along with a lock washer and one flat washer per bolt.
I didn't notice that the upper two holes on the Quicktime bellhousing were partially blind. When I installed the Muncie onto the Quicktime bellhousing, the upper two bolts just <span style="font-style: italic">barely</span> bottomed out before drawing the trans down fully tight. They were tight enough where no play could be felt, but I'm sure in operation there had to be at least a slight amount of movement. I did note that the broken ears from the Supercase were still <span style="font-style: italic">somewhat</span> tight to the bellhousing when the broken trans was removed, but they weren't fully tight.
I measured the thickness of the mounting ears on both trans', and the Legend box is notably thicker (exact measurements are out in the shop, I forgot to bring them in with me).
Below are two pics of the new Legend trans with new 1/2-13 X 2" Grade 8 bolts along with a lock washer and two flat washers on each bolt. They are snugged down pretty tight, and as you can see they terminate just about perfectly out the back of the bolt bosses on the bellhousing.
Driver's side:
Passenger side:
Here's the mounting face of the bellhousing showing the clean-up skim cut it received on the mill after putting the lower passenger side mounting tab back into position.
As you can see, it was barely enough to remove the powdercoating. It's again parallel to .000"
The clutch disc has been swapped, a new pilot bushing has been installed, and the bellhousing is back in place. I'll try to get the trans under the car tomorrow.
More to come.