[Vicky]

Bill Kenz built what was called a Reverse Cam Model A Engine that included with a Miller OHV. The Cam (and everything else) turned the same direction, only it reversed the intake and exhaust ports to allow four ports for intake and only two for exhaust. It would have allowed for overlap of intake on cam timing, but I would think some restriction (and maybe heat issues) with only two exhaust ports.

This concept was also used with V-60 Ford Engines in Midget Race Cars in the 40s-50s.

Bill Kenz was much more innovative and smarter than me, and since the concept was also used in other applications, there must have been some benefit.

Another thought, if the engine rotation was reversed, the transmission would work fine, but you would have to the reverse the rear-end in the housing, or you would have one forward gear, and three reverse.