Gerard,
<<Those of you in warmer climes such as Down Under what sort of oil temps do you run in the clim and cruise on the 320?>>

In my 360, during the middle of the summer (central California, up to 105 deg F on the ground), I see 200 to 210 deg F in a long climb followed by 180 to 190 in cruise.  All other times of the year, the oil temp is a constant 180 deg F.
My oil cooler sits infront of the #2 cylinder.  It is a SW 10599 with the exit area chocked down to about 7 in^2.

Chris Zavatson
N91CZ
360 std
www.N91CZ.com