I ripped out the old manual brakes that were in my '73 and upgraded everything. Went with a Baer setup in the front and rear, along with their master cylinder, prop valve, and mated that to a dual 9 inch booster. After I installed everything, I bled the system 3 times, and was having issues with the pedal coming back really slow, and coming off highway speeds, it felt like the brakes were dragging. Changed the booster on warranty, and those too issues seems to have gone away. But I am still experience the brakes really slow to bite, and it's much more noticeable coming down from highway speeds in a hurry to a complete stop. It's like nothing...a little brake...brake...brake...BITE! And then it slows down. Just not a linear feeling at all. Any ideas of things I could check?