The front end always plowed on my ebony. Really I always wished the back end would have more decision making power in the corners. I attended my 1st auto-X in the 6mt the sunday after reading and all I have say is WOW. What a difference. The ability to kick the back end where u want it keeps the front end from plowing. If you are seriously trying to get rid of this kind of manuvering difficulty, there is a center differential available for 5mt boxes that will convert it from the 50/50 split to 35/65 like the 6mt's. They are fairly pricey and can be found at
www.Rallispec.com. I am sure there are other sources but this is one I know of for sure.
Edit: Just took a look at the price again and at $1438.00 for the Cusco Tarmac center diff. I don't blame you for reconsidering. Might as well pick up a 6mt for that price
Tom