As far as I remember they are identical, some early ones may have had smaller bolts, but if you check the part numbers cast into the links and they are the same and both have the same number of links they will fit.
Thank you!
do you know if you have to remove a shoe to see the part number cast or is there a way to view it without removing it?
tu!
The part number is cast in the side of the link adjacent to the shoe.