Some good info there GTSboy, i was thinking it would be getting a bit messy with all that welding. So i was thinking about milling some slots in 12mm flat bar.
I didn't really think about it being too cool, i guess if i did it i could cover up or bypass the cooler for the street and drags and then use the cooler on the track.
So nismoid how long on the track are you driving for without having the oil get too hot?
I'm not to worried about warm up time as the car is not driven daily.