for a street legal car, I'm not sure it will be that much of an issue. You will not be turning the 9-10K rpms seen in a racing environment, but more likely 6-7K at most. An oil cooler is a must, and likely one with a fan just in case, but I wouldn't go crazy on it.
If you do want the best cooling out there, the current Fluidyne setup is about the best you can get. The main oil cooler, combined with a top end oil cooler will reduce oil temps dramatically. Another item to consider is a NACA duct placed in the hood directing air to the back 2 cylinders.
If you need further info on the fluidyne items, let me know as I sell there products and can assist you further. Again, i don't really know if that is needed though for the lower RPM's you will be seeing.