Ralph,

Can't remember if I told you, the carb I sent to you came with the Redhead when I got the engine from someone on RCG, so I can't be "certain" if it was original to the engine.

The differences are interesting; it appears that yours has in flight mix control.

I suspect that the spraybar with the slot "on the side" is correct. The air moving through the venturi would shear off the fuel flow and possibably atomize better than with the slot on the bottom of the spraybar.

Jim