I've wondered about that myself. Just curious, aside from this '318 race', did you try a 904 with 3.23 or taller gears against an A500 with 3.91 or lower gears? Thanks.
In my case I swapped a A500 in place of a 904. I even had the A500 converted to non-lockup so I could reuse my 904 converter. In my case the only change to the car was the transmission itself. All the details are in this thread: performance 904 vs. A500 (42RH)
