67 Cuda 5.7 Hemi Tranny Advice Needed

So, if I understand correctly, if I go with an A518 or my 5-45RFE, I'm gonna have to cut up the floor. I'm not terribly concerned about that, but what about the Torsion Bar Crossover Brace, going from one side of the front frame section, over the tranny tunnel, then on to the other side of the frame. Is this crossover square tubing structurally important to the floor or the car in general? This square frame-like tubing is definitely gonna be in the way and will have to be cut out. If all it's there for is the torsion bar front suspension, and doesn't offer support to the car in general, then I'll cut it out, no problem.

Lemme know.