Hi,
i hava found 2 Cylinder Barrels (Think Flange)
They are thick flange
"Lost in translation"
Are the bores damaged? from your chart the max deviation seem to be 0,08mm = 3+ thou
GPM pistons will be "bigger " than the original Hepolite
I would need to go and find my old build notes,
If theres no scoring then a hone and GPM's maybe a solution
John