parts source

I know that. I could not find any listing for a 1966. The return spring did not fix the issue I'm having with the brakes not releasing. I just don't know what else to do. I have sent the booster to booster Dewey twice. They rebuilt it, set the rod length and mounted the new master cylinder. I have replaced the wheel cylinders, shoes, hoses, return springs. Adjusted and bled the brakes. Still very low pedal and pedal will not come back up without putting your foot under it and lifting it. The car is all original with only 32 K miles, and I can't take it anywhere because of the brakes. I just don't know what else to do. The only thing I can think of is to check the rod length again, but Booster Dewey has the master cylinder stuck so hard on the booster I would have to beat it off with a hammer. I took the car to a good mechanic here in Kansas City, they say bad booster, and I send it to Portland and Dewey says it's OK. Anyone know of a shop or member in the Kansas City area that could help me get this problem figured out?
I worked for a brake company in Portland Oregon. They rebuild anything booster related (atleast when I was there) place is called BSI or Brake Systems Incorporated. Ask for Rob, good friend of mine and a motorhead, he'll make it happen . Good luck!