Budd Davisson has a great piece on the karma of overhauling your engine in Plane and Pilot. Anyone who flys acro down to altitudes where you need your engine to keep pumping out flawless power will "get" Davisson's thoughts.
http://www.planeandpilotmag.com/pilot-talk/grassroots/heart-transplant.html?start=1#.VGDGUUB4DjI
Enjoy,
Wes
http://www.planeandpilotmag.com/pilot-talk/grassroots/heart-transplant.html?start=1#.VGDGUUB4DjI
Enjoy,
Wes