8.25" rear rebuild....thoughts???

OK..first off, my Dart is street car. The first words out of my friends mouth when I told him I had a mild 360 with a 904 and 8.25" were "That drivelines got to go." Then he preceeded to tell me how it was required to have an 8.75 rear for easy center changes when I go to the track...

Somewhere in there he forgot I was not building this car for the track.... :scratch:

My plan is to build an A-999 for a transmission later. For now the 904 is pretty fresh, and I won't be beating on it until the rearend is redone.

I have a 8.25" open diff with 2.45s...It was originally a 318 car. My motor is a 9:1 360, .030 over, ported iron heads, Airgap intake, 624 Carter, 450/475 cam, comp headers, electric fuel pump, Stage II FBO ignition, blah blah blah......

I have gotten opinions before, and many people say the 8.25 will stand up to what I've, as long as I build it right...

My question: What is RIGHT? What axles? What Limited slip unit? Will a factory SG be good enough? I plan on installing rear discs and a set of 3.55 gears.