65 dart 3 inch exhaust

Ok guys, I really need some help. I am stepping up to a 3 inch exhaust in my 65 dart gt. I do realize that the odds are not in my favor due to the tranny crossmember. My question is how have any of you fixed or gotten around this problem? Do I need to cut and rebrace my crossmember, do I just run it under and hope that I don't crush the pipe on a pothole, or just what is the best answer?
And before you ask, yes I do need 3 inch. The dyno showed an almost 18% increase in torque with it. The car already has frame connecters, but they are not in the way. This is my first shot at an early A body and I am sure that I will have plenty of questions as I go along, so if any of you guys have a 65, I would really like to hear from you. Knowledge is power and power makes it go FAST!!!!