As part of my GT look alike project, I spent quite a bit of time on the oil system. Here's the link to the overall project thread:
http://www.914world.com/bbs2/index.php?act=...=ST&f=2&t=34896
There's several good threads on the site about coolers. I started one, soliciting opinions about a possible oil cooler to use. I must say I had not done a search before starting that thread. If I had, I would have found a lot of the information I was looking for. see:
http://www.914world.com/bbs2/index.php?act=...=0entry529632
I've decided to move away from the solution I was exploring there, which involved Porsche 928 transmission oil coolers and instead to use an Rx7 cooler that I will modify and then have ultrasound cleaned. Actually, all the parts below will need a super-thorough cleaning before the engine starts, to avoid contamination. There's a place in town that does ultrasound cleaning, and that appears to be the best route.
I have also started a thread on the hard oil lines, and tub modifications to make room for those. See:
http://www.914world.com/bbs2/index.php?act=...=0entry529632
I have'nt sourced the hard oil lines yet.
In any event, I've done a lot of work on assembling a GT style oil system for my car. Here's an overall view of the part of the system in the engine compartment: