I installed the 2.75 later Diplomat calipers. The Hose Mount location comes in from the bottom. This seems better than the A Body 2.6's that feed from top.

We installed the calipers and new Ambulance Pads (Metallic). The car seems to brake fine, but won't put you through the windshield.
Coming down driveway I was able to lock up both front first.


All in all its safe now. I will still try some adjustment and the 7/8 rear wheel cylinders.