I see... I hope you don't mind if I challenge you? It's not that I think you are wrong, I just think that you believe exactly what people are spoon feeding you.
Florida has no emissions control regulations, and half of the people here would fail inspections in a heartbeat (myself included). I just want to question where you acquired your info from? I don't mean to sound disrespectful, just trying to get all my facts straight
I have an 89 Mustang 5.0 that I have had since new and do a lot of work on. The statements concerning the smog pump are correct. On warmup, air is directed to the cylinder heads. After that it is diverted to the cats. It is seperate from the EGR system which routes exhaust gas back to the intake.
99 Durango 5.9, FT 4x4, IP stage III w/ K&N air hat, M1, SCT, Fastman TB, 1.7 RR, JBA headers, Borla cat back, Martin Saine valve body, Hotchkis swaybars, Blistein shocks, lowered 2" Black Rhino Kenya wheels, 246. 7 RWHP, 319 TQ