Thinking about shortening my frame and have one last question.

[Jayschevy]

I'm thinking about shortening the frame on my 71 and keeping my 2 piece drive line. The frame part I have covered. However, I was wondering if everone was cutting down the front drive shaft and rewelding it or is everyone taking it to a shop to get it shorten. I can weld it, I'm just not sure if it's suppose to be balanced or if cutting, welding and grinding down the welds are good enough.

Thanks