Here's a good read on the oiling issue with RB engines.
The SkyLife - Modified and Exotic Car News Community, Tutorials, Build Stories and How To guides.: Nissan Skyline GTR Oil Pump problems
I have the snout issue, but I just said fuck it and slapped a new N1 oil pump.
As far as temp, I'm not running AC, using a Nismo thermostat, some no name Ebay Aluminum rad, Dual FAL fans that I'm using as pushers and a PBM Swirl pot. No issue at the track or daily with the fans on. Car would get hot on the track but not till after running it hard for a while. I'd kick the fans on, chill for a few minutes to get it back down and would sit about 76*.
Still running a stock turbo setup so putting down maybe 210 on stock boost. I got a old IHI turbo kit to put in that should get me close to 400 and be happy with it.
