Question: do you have solid engine mounts on this?

No, but I will be putting one on the Drivers Side now..

Currently has Original Style Rubber Motor and Trans Mounts.

I've seen solid mounts do that. Also, I've had to center most bell housings especially blowshields.

Hard to tell from the picture but.. is something broken here on the crossmember.

Attachment 258818

I've been using solid Moroso mounts on my Camaro since '84. I had a solid transmission mount on it for many years. It's had 3 Muncie transmissions, a AutoGear and now a G Force and I've never broke a tail housing.

Good Eye.. I thought the same thing at first then went back under to realize it was only a shadow.