Eastern Aircraft (Grumman) FM-2
 

The Vector engine.  Brass pushrod housings and bell wire ignition wiring was added, and Epoxyscuplt was used to make the lamb chop baffles between the cylinders. 
This is not the Vector engine that comes with the Vector conversion set for the HobbyBoss FM-2, which does have the lamb chops in resin. An .060 diameter length
of music wire has been installed in a hole drilled in the crankcase for later propeller installation.