Transmission Cross Members

Wow, ya learn something every day. How much trouble am I in? I have a 72 Swinger with a /6 and 904 trans. I’m putting a 408 Stroker and a 727 trans in it with dual exhaust. I take it I’m not going to be able to use my original crossmember?
That should be no problem using what you have. That car could have come with a V8/727 and dual exhaust.