MMM
Peter that one is different again to the stock vert bolt up i have ie a 3/71,
exact tunnel as pictured, but the oem item is very different, ill try get a pic & share any how.
Its info like this that needs a sticky, ie the difference of said items along the years, ie
'check out my ......' model year liklyhood of being altered along the way scale.
Your mount looks like a transition mount from the tunnel as pictured to the later style long bolts from front to back ie the later 'ear' type mounts,
My oem item is only a '1-piece'.
nat0