Torque Converter? Where am I at? What is compromised?

A TA “tight” 10” would be a pretty good compromise converter for the OP’s combo.

I’d expect it to have a true flash stall of 3500-3700 behind his 512.

Next step up would be something like a tight custom 9.5” from PTC or UCC, but frankly....... those might end up being a little loose for the OP’s 244@.050 cam.