Why not call Aero Sport Power (http://www.aerosportpower.com/), they are
near you I think. They specialize in engines for Experimentals, but can
probably give you some good advice. They have a very good reputation in
the Experimental world of aircraft.
--
The degree of one's emotion varies inversely with one's knowledge of
the facts. The less you know, the hotter you get.
~ Bertrand Russel