As is true of most things that pertain to the FE, I believe it depends, very much, on your particular combination. If you are interested in tracking, I believe you can make use of a good oil cooler no matter what you have in the way of other hardware. There is such a thing as a thermostat-controlled valve that will cut a cooler in-'n'-out of your circuit. It may make sense for you to look in that direction. And I can tell you from experience that a Mecca accumulator with an electrically-operated valve is very worth having.
KS