thanks for that. spoke to a mechanic mate of mine this morn about it. reckons 3/8 steel tube is the go for this and then use the appropriate line on either end. I'll toss push lock hose into google though that sounds like what I need.
in regard to diff coolers :
not a track hack thing. I figure if everything is cool it will last longer. learned that years ago with a rather warm small block chev. I'm fabbing steel lines up for all of this and I'm trying to make it as 'factory' as possible. two coolers under the tail (as per a Oz spec GTR ) and one in the nose.
my subaru wagon has 3 coolers on it and since doing it I have not had a problem with oil or trans temps (it's auto.) the third is PS. thought if it worked well on two prior cars it will work on this one as well.