Get an IO320B1A sump installed on the bottom of whatever motor you buy.  Get
Lycon from Visalia CA to modify it for forward feed, Get an Airflow
performance fuel injection system installed, comes complete with boost pump,
flow divider, tubing etc. Add an alternate air valve assy and ram charge
your air from directly behind the prop and just under the spinner.  I get
1.4 inches boost on my 360 per the "Don" Goetz.  Works great. that equates
to about 15 hp. The certified remanufactured shop that  assembled the engine
ran it on the test stand for four hours to break it in and thus removes some
limitations on you for flight tests.  He also stated that the above
configeration produced 2 inches more manifold pressure that the standard
bendix injection system.  He was impressed.

Bob Smiley
 N94RJ