4 piston ft calipers
The pistons and dust boots, and brake pads for that matter are the same as '67 (and other years, I'm not a Ford guy) Mustangs. Seriously, they're about $10 a set. Go to Napa and ask for the Mustang seals and pistons and shoes. I got some last year and the box said for Chrysler Kelsey Hayes and for Ford Kelsey Hayes. They made the calipers for both, but the Ford calipers are slightly different so you can't use them on a Mopar.