i own a T56 tranny from a 2005 CTS-v rated at 400ftlb. I am thinking of getting a 383 block which is to put out about 450ftlb at the wheel...

Keeping in mind that all the other drivetrain parts need to be swapped out for stronger ones, will my tranny hold up? Or do i need to upgrade some of its internals, and if so how/who can do it?

Thank you for your time