Hi everyone I HOPE SOMEONE CAN HELP ME . I HAVE AN 83 CAMARO WITH A 74 350 MOTOR I HAVENT HAD ANY PROBLEMS WITH IT UNTILL TODAY.THE RPMS DROPPED 300 AND THE ENGINES SHAKING ALSO SEEMS TO LOST POWER I PULLED THE PLUGS AND THEY ARE REAL DARK WHEN THEY USE TO BE LIGHT TAN IM THINKING IGN MODULE EVEN THOUGH THE DISTRIBUTOR WAS PUT IN 2 MONTHS AGO ANYBODY HAVE ANY IDEAS