Don't get talked into converting to a Borg Warner T-5 Transmission. That is what I used when I built My +8 Bitsa. My T-5 works well but I had a mis match of parts to start with. I have driven +8's with the Rover transmission and it worked very well. Maybe better than the T-5 at least as good. I think some +8 Racers in the UK like the T-5 for some reason I am not sure why.