It appears that 90 thru 93 are the norm but I'd bet 79 thru 93 are dimensionally the same, with different mounting holes and maybe some mount holes missing, like the ps cooler line or air diverter. Buuttt I'm not a panel beater so I could be mistaken.
Cover it with a political bumper sticker, nobody will notice.
Only the fox mustangs...and older 80s thunderbirds.
In 90 or 91 the core support changed to have bolt on bumper supports.
There are tubular lower core supports that are available for our cars but it only holds the radiator. The ac condenser and PS cooler line brackets would have to be fabbed up.