Tremec TKX conversion in A-body!

Based on the last picture, I would guess you have the wrong ball stud mount on the bellhousing. If the z-bar were higher on that end, it sure looks like it would all clear. Plus the angle the z-bar tube is coming into the ball stud looks tweaked.

Or maybe the ball stud mount location is wrong on the bellhousing?

Either way, I would look at the mount first.
Yes, that's what I'm thinking as well, but I made sure to get the correct bellhousing ballstud from Brewer’s. I researched it quite a bit for this exact reason and then came up wrong at the end..