If your looking for Brison engines keep your eyes peeled on the For Sale forum. They show up fairly consistently. One thing about the chainsaw based engines, it's about impossible to wear them out! Power output is right up with newer engines (if you prop them right!) and for war birds they offer many advantages. I say it is the difference between a plow horse and a race
horse! What you need for war birds is the plow horse that can out run the race horse!
Larry