68 Valiant Hellcat Swap

Just a question about the upper tranmission mount,is it still needed if a person is not using the torsion bars? Going with a aftermarket k member, which eliminates the use of torsion bars. In this case,can I just use a lower tranmission cross member?
Any cross brace in a car gives it additional support. However, I have seen some builds where the torsion bar brace is capped off and left alone. That being said, on a car with torsion bars the torsion bar brace needs to be strong when the suspension is under load and I would definitely recommend it.