I am not 100 percent sure, to be honest i can not take the rapp for building this little bullet, it was built buy a guy in Melbourne who now lives in Sydney named Allan Pitt. As far as my memory can serve me the rear brake set up is pretty much the standard gear although the drums themselves have been drilled to assist in cooling. The use of drum brakes is something that a lot of guys overlook when in actual fact they can be very effective if they are set up correct and maintained. The front brake system is again from memory Volvo rotors with Mazda calipers (dont hold me to this although i am pretty sure) The diff set-up is not something that i can share with you, all as i know is that the centres themselves cost around $3000 each and the actual housing is from a datto Ute.
Again dont hold me to any info supplied, although i am sure that the guy who bought it of me would be happy to tell you more, he sounded like a pretty cool sorta guy over the phone and easy to talk to
Cheers
Peddler