Hmm..., Larry and Jim are forcing a rethink towards dedicating the Challenger to diesel power. I too am a fan. When I bought the ribs and plans some years ago, they were intended for the KMD 2.5 diesel. Thus I'll stick with the original intent. Also, and because I've got an Enya 15 IV sporting a muffler that tips the scales at the same weight as the KMD, I mightn't abandon the twofer idea after all.
So glad, Larry, that you provided a description of the Cox 15 running style. Might make for a fun circle burning speed plane, should the need ever arise.
A bunch of thanks to you both.
Dave Mo....