What are pitfalls of "hard mounting " tranny vs rubber mounts?

NVH
Noise, Vibration, and Harshness
If you have ever run a car with a wrecked trans mount and the trans sitting metal on metal, well there is alotta lotta racket and vibration sent into the floor. And on every shift POW!

That's a nice looking mount tho,
and I'm wondering about the two downlegs, below the hoop. Are those biscuit mounts?
But if you are keeping the T-bars, I see your point, you would need a massive hoop to pick up all the points. Have you considered suspending the trans from two side mounts? Or a top mount even...
There's also no reason you couldn't divorce the mount from the T-bar hoop and move it back further to the rear. The tail is aluminum right; you can weld a bracket on wherever.
Careful not to run out of seat-rail space,lol.
Yeah I see a bit of thinking time for sure. I'm very interested to see how this all plays out.