Looks like the 6R4 bits have been split off from the end of the Metro Turbo thread- that's cool, we've got a 6R4 thread....
Think this is the only 6R4 pic I've got to hand right now, though there are plenty more I can post- mostly rallycross, and a few questions raised by them.
Pic is Guy Williams at a Lydden rallycross meeting, 1990/91-ish I think