Used driver side (left hand) front drum brake backing plate for 2-1/2 inch brake shoes on the Mercury Cougar or Ford Mustang, and Fairlane / Torino equipped with 351 or larger V8 engines.
Ford part # C9OZ-2013-B.
*NOTE* Excludes 1969-71 Mustang and other Ford/Mercury with 302 engines, which normally came with 10" x 2-1/4" drum brakes on the front.