Caliper Summary Time!
FRONT: Type "CR" 2 pistons, 2-3/8" diam. Alloy one piece casting. "Typical"
Seal Kit #SP2502.
Type "17/3" 3 pistons 60mm and 43mm Cast iron two piece castings. "Later cars" Seal Kit #SP2577
REAR: Type "ORA" 2 pistons, 1-3/4" diam(?). Alloy one piece casting with parking brake. "Typical but interspersed with 12/3 type thru production. Seal Kit #SP2557 (???)
Type "12/3" 3 pistons, 42.8mm (1.685") and 30.2mm (1.189"). Cast iron two piece castings with parking brake, can be marked "Fiat-Girling" Used on Fiat 2300 sedans and perhaps Fiat Dino's. Seal Kit #2524
Pads are Jag E-type 69-75
Parking Brake Pads: (I believe these to be the same for all, not dependent on caliper body.
#GPS518H, GDB518, GD518, MGB518 Lotus Elan, Plus 2, Climax, and Elite models.
Master Cylinder Seals: #4115452 7/8" "Fiat Seal" Round donut seal. Many M/C and Clutch apps!
NONE of these had crossover passageways ala Pantera calipers, but used external crossover tubing.
Bleeder screws for CR's and ORA's are same as Fords of the day...Mustang etc...at least they can be substituted... Can't say about 3 piston versions....maybe.
OK, that's what I recall,,,,can edit post to put in ?? values or take ?? out.
Now I can forget this....and remember something else useless.....!