New (not rebuilt) large GM front calipers (metric line connection) includes:
calipers, D-52 pads, mounting bolts. Piston Diameter 2 13/16. 7 inches center to center for the mounting pins. Banjo Bolt thread size 10mm x 1.5mm
Part Number 3010 $120.00 pair (left and right)
These calipers come from 78-87 K10 and K20.