When you say, "piston that I removed", do you mean the physical piston in the caliper or the entire caliper? Problem is, if it over heated, it probably marred up the inside of the piston sleeve. I'd do the whole caliper. In fact, I'd do both since this is more common than Ford would admit.
Get some good aftermarket brake pads and turn your rotors if they need it. Flush the fluid too. If it got overheated enough to crack the piston, it probably baked your brake fluid. Once it's overheats, it breaks down and can accumulate moisture and lose it's viscosity.
My motto: If you only take care of two things on your vehicle, make sure it's the brakes and tires.
If anything else fails, you'll live. Losing brakes or a tire can become life threatening really quick.