Splice or Replace Torsion X-Member

My torsion crossmember was hacked up by some wingnut who didn't know how to work in cars. The part that's missing is where the floor was cut out for a 4-speed hump.
My question is: should I splice a section of crossmember from another car into mine, or just replace the whole crossmember? The rest of mine looks good, no rot.
I have no plans to drive it on the street, just drag race it.