Finally get to pretend I am one of the cool kids - Holley kit swap

If I had been really smart, I would have bought or found a model of the T56 and inserted it so I could see it in my layout.

Tremec T56 Gearbox — Bremar Automotion 3D Scan Store
I'm a little late for this but it might be worth seeing if this one is accurate. Way cheaper than others.