Hello
I wish I could find the nice drawing I have a copy of from Bob Putnams ERA site......it shows the line's orientation to the
oil filter and cooler to and from the adapter on the engine
As best as I can describe it... the bottom most large hole is the "outlet port" which goes to the inlet side of the remote
oil filter (in-port) The out-port from the filter now goes to the right side (pass side) of the cooler....then come out on the opposite side (drivers or left side) of the cooler and go to the top most large port ( inlet port) on the adapter at the block. You are right about the smaller 1/8" NPT port is for the
oil pressure.
Hope this helps you my fellow canuck.........Nice engine and colour choice
Tim