Agreed, they look like '73 and up A body or '76 and up F/M/J calipers. BUT, it looks like PO flipped the spindles side-to-side and rear-mounted the calipers (common for sway bar clearance); in which case you need to use longer brake hoses from a '69ish disc brake Camaro or the F/M/J body Mopar.
Camaro: More Information for RAYBESTOS BH36672 (rockauto.com)
F/M/J: 1976 DODGE ASPEN 5.9L 360cid V8 Brake Hose | RockAuto