Welcome to TorqueCars. Looks like you have an impressive list of
mods. I'd love to see some pics when you get upto 10 posts.
I've just done some web work for a property company in Polis - don't suppose that is near you?
The Supra is more of a drag car as you are finding out. With a bit of playing with toe in at the front and camber neutral (straight) at the back you will find it is a bit better. You absolutely need a locking diff for proper drifting as well. Fit narrower wheels on the rear and you will get a bit more slip going.