Yeah, the fan shroud is date stamped '67. But the left side case also has a square 4-bolt accessory mount with the clutch guard attached to it. When did they start having that? All of my old engines have a smooth left side case. Is it possible that the original fan shroud was installed on a replacement engine? The paint on the fan shroud and engine matches very well, and the Lil' Indian decal on the shroud appears to have been there a long time.