Im currently...Well have been for a while, building a GC8...
Parts from them, and the GD's fit so there is massive amounts of used stuff out there... you can even go to a 6 speed later if your that way inclined, you can run a car similar to Curley and Wavey's with standard Diffs or you can go thw whole hog and somewhere in between. Look at the recent results to see how well an old GC8 does amongst some much more expensive and tricked out cars.