I just went outside and measured on a #s matching original drivetrain gs 400 400 tranny.It is 60 3/4" from one end to the other. same spot as in picture on each end is where i measured from. :TU: Mike
Length is usually specified from the center of one u-joint bearing cup to the other. But if you refer to these directions from Denny's Driveshaft, it's a different definition: http://www.dennysdriveshaft.com/how_to_measure.html I'm sure Bob is clear on your measurement, but others might not be!