The one of mine with them is from the north and was mid-year production (I think). The one without them is a late production '85, from the south, and never had them.
The dealership I worked at was in Massachusetts , I had an 86 LX 5.0 Mustang I bought new and it definitely had them
This is my first car with digital gauges, by the way y'all are talkin it sounds like they may grow on me :D I definitely think it would be more work than I am interested in
I seem to remember when the cars were new most of them had those , it was some sort of "crash protection" . I believe they were supposed to keep the tank from rupturing in a rear end collision BTW I worked at a Ford dealership as a technician from May 1985 to July 1991 , that is where my memories come from :D
Ranger / aerostar rotors work on Mustangs and my parts listings show mustangs and tbirds take the same rotor (pre 87 stang and non TC birds right up to 88) I know the inner bearing and race need to be changed, but beyond that why wont the Ranger rotors work on the tbird ?