RE: Falcon 56
Aerowoof and Buzzard Bait (and maybe others - bad short term memory here) are correct in that the modern, high horsepower .46 schneurle ported engines will only appeal to those that like to go blazingly fast and land at space shuttle velocities. I would pick a good .32 to .40 engine of a lightweight design. The OS, Magnum and ASP .32 sized engines would be about perfect, as would the Thunder Tiger .36. The latter would provide spirited performance and would not be slouches in the least.
Ed Cregger