My 78 LRT has been sitting on the side of my garage for the last seven years. I got it running again out of a gas can,and I bought an electric fuel pump to pump the bad gas out of the tank. I moved it and the brake pedal is not fully releasing when I take my foot off the brakes. I figured it may be the brake hoses or stuck calipers,so I replaced the hoses,calipers and brake pads. The brake pedal is still not releasing,do you guys think it's the master cylnder,the brake booster,or both?

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