[Greenlee]

Hmmm. I read the link above and it reads to me like it should be checked visually before 84', but only "if present." Doesn't really make sense. Probably means if it came with one it should still be there, but will only be inspected visually.

The catalytic converter will be considered as a part of the exhaust system on all vehicles prior to 1984 year model and will be inspected only visually (if present) for leakage. On 1984 and later model light truck and passenger vehicles, the catalytic converter will be checked for presence and leakage. Flexible tubing which meets the requirements listed below may be used anywhere in the exhaust system.