oil cooler ports

[Big Blue dsl]

i am in the process of assembling my new 18:1 engine and am wondering which of the three ports are the ones for the oil cooler and which is the one for the by-pass/banks turbo oil feed
anls can anybody tell me the thread of the oil cooler holes ?(-599 block)


thanks
chris

[snoman87]

does this make sense ... The lower two where hooked up to my oil cooler lines and I used the formost top and closest to the exhaust manifold one for the turbo line.