Bill:  You didn't say where you live and/or fly out of but I am thinking a
5-vane oil cooler is much too small.  Perhaps you should ask Lance and
company about this.  My 7-vane is just right for cruise (about 180 degrees)
but oil still heats up on hot summer days climbing out too rapidly.  My
guess is that most builders in the south use 9-vane coolers with naca scoops
on their 360 engines.  It is certainly easier to restrict air-cooling in a
plane that has too much cooler than it is to suffer the consequences of
overheated engine.         Greg Nelson