In the words of the Late Great Ed McMahon: YOU ARE CORRECT, SIR!
UAW picked Norwood, the only plant that made the F-bodies in 1972 as their strike target knowing it would really affect GM. The line was struck in late March, 1972 and all the cars still on the line ended up being crushed because they would not meet the 1973 emissions (EGR valve) requirements and the 5 mph bumper requirements. There are some famous old assembly line photos of the cars hanging in and out of the primer dip tank, just sitting there like meat on a hook, for months. Because of the strike, which didn't end til September of the next model year, GM came very close to killing the Firebird and Camaro model altogether.