Just got 1985 Cutlass Supreme from storage, been setting up for several years. Enjoying driving for several days, then when turning off switch, engine will not shut off and automatic shifter locked in "P" position but car out of gear. Just jacked around with it for a while and got it to shut off. Two weeks later happens again but switch in in extreme forward position. Played with switch again and got it to shut off and go into park. Is this issue with the ignition switch or the neutral "gotta have your foot on brake" switch? Any info would be great.