Need help, lengthen torque tube?

[EBmotorsports]

Hey guys,
I'm starting a new project and we are discussing suspension options. We are looking at buying a c5 corvette complete chassis setup but the wheelbase is about 6" too short. I've done some searching and it looks like the torque tube can be lengthened but I've not found any details to it. Has anyone here done that or had it done? If so could you please provide me with some details. Is it a simple cut and weld deal? Any help would be appreciated before we spend the money on the chassis. Thanks in advance