This is the cases of an old hillclimber or race knucklehead.
Right side case has the boss for the idlegear milled off to make
place for chain to the frontmounted magneto.
I bought the cases on egay a half year ago,
I only got 61" cylinders im probably gonna change them for a pair of 74".
And i gonna use my old big valve heads.
Maybe change the intakes.