The key to not ground-looping the Corsair is all about a controlled approach, and touch-down attitude.
I fly final with full flaps, max RPM (in case you need to wave off and go around), and 25" of manifold. This should set you up for an easily maintainable approach speed of <120mph. As you cross the end of the runway, pitch for around 100 mph, flare about 20 feet above the runway. Maintain the pitch attitude that gave you 100 mph at 25" manifold, and chop the throttle. If you maintain that nose high attitude, you will make a 3-point landing and can avoid the ground loop. If you bounce, relax pressure on the stick, let it float and then pitch back again. If you land a 3-pointer, it is almost impossible to ground loop. I'll be more than happy to show anyone how to land the Hog--at a field or CV. Technique is the same on both. Just let me know and we'll set up some time in the TA...
P.S. I find that a lot of nose down trim helps me maintain the proper attitude at the flare. Counter-intuitive I know, but it may be just a joystick feel issue.