wilwood rear brake conversion

I have the Wilwood setup for the front. I will be adding a similar kit to the one your talking about for the rear as soon as I can find an new/newer one second hand. If not, I plan on buying new for $658 here: [ame="http://www.ebay.com/itm/Wilwood-Rear-Disc-Brake-Kit-Mopar-Dana-Green-Snap-Ring-Drilled-81-Rotor-/191277257228?pt=Motors_Car_Truck_Parts_Accessories&hash=item2c8903520c&vxp=mtr"]Wilwood Rear Disc Brake Kit Mopar Dana Green Snap Ring Drilled 81 Rotor | eBay[/ame]
It's for a 2.36 offset. Going with black calipers will save you $100. I know some people much prefer the red ones. I like them myself, but not with my green body color. I'm going to the ends of the earth to avoid red on anything.
The Master cylinder size comes down to manual vs. power and disc vs. drum or combo disc/drum. My research lead me to buying a 7/8 Wilwood master and their proportioning valve as I am going manual w/discs at all 4. In general, smaller for manual and larger for power. After a lot of research, I will tell you that it can ultimately come down to experimentation. Especially if you have a strong preference for soft vs. stiff pedal feel and long vs. short travel in the pedal.
I did buy the same Wilwood in a 1 1/8" version, good for power, before doing research. It's new. If your going power and need one, let me know.