I used the
oil cooler and shroud from Finish Line and the Earl's sandwich-style
oil cooler thermostat.
I have been very happy with the setup. My
oil gets up to 100c pretty easily and the cooler keeps it below 115c even when driving hard. As many have posted, oil rarely getting above 100c with an oil cooler and no thermostat can be damaging to your motor.
I mounted the oil thermo and filter off the cylinder head, like on FE's, and ran the lines over the radiator. Here are some pics:
