motorman and Pat
This is what we are rebuilding(X3) we have 3 to do.
http://towd.smugmug.com/photos/215259288_bcPMH-M.jpg

These modified VW motors have extentions welded on both ends of the crank
"flywheel side " has a bearing housing with a Heavy duty thrust bearing for the 6 groove pulley that drive the 3 blades.
the other end has a crank driven fan (like the type 3 and 4 VW motors).
1700cc estimate 60hp runs at 2200rpm
will cut huge logs or small and cuts dimensional boards-
dial in a 2x6 it cuts it and brings the board back
put it in gear again and while you are stacking the board it cuts another all day long.
of course any tips would be helpful and appreciated