4 piston calipers question

The pistons are shown as the same part number as 1967 Mustangs. As @junkyardhero said the Mustang used more than one size, but the '67 crosses to fit all of our K-H calipers. If you trust the parts book, sooner or later you'll get bitten. So verify the fit. The pistons in the link should fit. Contact them and get the dimensions to be sure.

https://www.cjponyparts.com/disc-brake-caliper-piston-1967/p/BCP2/