Used on the early Fox Mustang, Mustang SVO and by Saleen on the 87-93 models...this strut mount is much better than the other production mounts used on Most Mustangs from 83-93. This allows far less deflection than the other units. This is one of the tricks we used on our 24 Hours of Lemons car where you get dinged for having caster camber plates but this is a stock part and slides right by giving you improved handling without getting penalized. 

79-93 Mustang Onion head strut mount-used