Reading through the forums I see that the rear cylinder on the SH runs hotter than the front due to the fact that it does not get an adequate air flow.

Has anyone thought of or is there a way to create a ductwork system that would provide a source of cool air to the rear cylinder?

 

Any ductwork to divert air to the rear cylinder would probably divert that air from the rads. Here's a whacked out idea, but it may work. On computer CPU's they're starting to use carbon nanotube "heat sinks" that are far more efficient at cooling the CPU than fans, but have no moving parts. Just a little air moving over one on each side of the rear cylinder might provide the cooling needed to match it to the front cylinder. (if they can fit - I don't have size specs) Of course, the next step is probably rejetting.
As whacko ideas go, it might just work.