Any Reason to Cut Transmission Crossmember?

I want your sure grip 8-3/4 lol, all being said weld in the new piece, download the pattern from TTI headers and modify you're removable cross member to the same curve as the driver side for your dual exhaust so it doesn't hang low if the car was a single exhaust originally, and if you have proper components all should be ok, and install sub fame connectors which you probably already are if you are gonna be taking it to the track