Brakes Brake caliper ID help

[kidott]

I’ve just bought a 90 LX 5.0 for my son. It’s got a lot done to it from the last two owners. It’s got rear disk brakes supposedly from a thunderbird turbo coupe. A front caliper is sticking intermittently, I was going to put on spares for my 84, they do not fit. The caliper and rotors are bigger, one piston Ford calipers with slotted and drilled rotors. Called the seller and he thought they were stock on the front. Anybody able to cross this caliper number over?

 

[AeroCoupe]

So your 84 has 10” front brakes and a 1987 - 1993 V8 car will have 11” front brakes. Calipers are different due to the diameter difference. Both have 60mm pistons.

A popular “upgrade” back in the day was to pour the 73mm piston calipers on them from the SVO Mustang which you could also find on the Lincoln Mark VII’s.

Based on the numbers on the back I’d say they are the 73mm units.