If you didn't notice, dyno dave gave me the answer i was looking for. And just so you understand.

My car made MORE Power with the 4.9 Final Drive then my friends car. Our Dyno numbers where run 5 mins after each other on the same dyno. So there's nothing to proof, i just wanted to know if my FD helped me in pulling a bigger figure than he did - and it did. Not sure what you're on about.