As a Machinist I have built several drive shafts and worked on equipment that has a drive shaft.
I always put a couple of punch marks on each housing to make sure it went back together the same just to eliminate any issues in case there was a problem after it went back together.
But the bottom line is a drive shaft is balanced before it is installed so it should not matter.
Unless he had to cut a yoke off and weld it back on. Then it needs to be re-balanced.
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