smallest diamater driveshaft??
 

just put in my th400 and the driveshaft is just hitting the nut on my T/A crossmember and when it is jacked up in the air the exhaust hits it. I am going to shim my crossmember and try to bend the exhaust, but can i go to a smaller diamater driveshaft to help gain clearance? I was thinking 2 1/2 inches rather than the 3 or 3 1/2 that was on stock. As long as it has a thick steel I shoiuld be ok right?