Why not just do an air to water intercooler. It would be easier to package. You put the intercooler in the engine bay and route the water lines up to the front of the car and run a couple of small radiators on either side of the opening for the oil cooler.
Check out PWR barrel type air-water intercoolers. Run a single or a pair depending on your setup.
http://www.pwr-performance.com/intercooler.htm