after giving my 75 Dodge the winter off. i went out to wake her up for some spring cleaning and a trip to the Dump. the Old Girl started upjust fine : ) but when i put on the brakes the peddle was (vary hard to push) and (wouldn't return) the peddle stayed down making the brakes lock.. it felt like a broken return spring or somthing.. i could still drive the Old Girl but i would have to pull the peddle up by hooking my foot under the brake peddle to release the brakes..... my first thought was the linkage and rod from the peddle to the master-cylinder was in need of oil... i crawled under the dash with a squirt can of oil and WD-40.. but that didn't work.. i then went under the hood and loosened the (Master-Cylinder nuts) to the (Power-Brake-Booster) 3 or 4 turns to see if the plunger rod was binding between the Fire-Wall or Booster.... i pumped the peddle a few times hoping it would free up.. NOPE the brake peddle still doesn't return after depressing it... so my QUESTION is... #1. could it be a bad Vacuum-Brake-Booster?? #2. how do i check the BOOSTER?? #3.can a BOOSTER be Rebuilt?