Wew I'm glad there's no smogging in the county I live in. The truck had its cat deleted long ago, egr was rusted out (in NM, How?!), air pump seized, evap is intact but I don't think it works (can smell it sometimes), air preheater missing.... So I trashed all the smog equipment (except the evap).
The Pug also had most of the emissions deleted due to vacuum leaks, because vacuum leaks+Bosch k-Jet=a bad time. cat is till there for now......
The Miata had an emergency cat delete because the ground strap and ignition coils took a crap and ruined the cat. The downstream O2 is just zip tied to the body braces
I've seen dual drain plugs on 5.0 LTD Crown Vics (or was it a Town Car) when I used to work for Jiffy Lube, I think we took out both to be safe.