I'm looking to upgrade my 69 dart to 4.5 pattern disc setup. Right now it has the stock 4 piston caliper disc setup. I'm looking at this one kit that comes with most everything including the upper control arms.

http://www.ebay.com/itm/380685626790?

Is there anything else I might need? Should I change to a newer 2 bolt master cylinder? Will my proportioning valve setup work or should I change it?