Looks like it's Cardone 18-4491 (right) and 18-4492 (left). I'm surprised they're available as it was a 2 year only item. I wonder if the 69/70 single piston calipers (and their pertinent caliper brackets) can be used instead.
I have heard that the 4-piston early disc brakes can be troublesome unless you get the bores sleeved properly in stainless steel by a company that known as "Vette Brakes". Pistons can get cocked in the bores and stick, plus they can leak. Sleeving them is supposed to cure those tendencies. Another thing about the 4-piston discs is that the calipers are fixed and are intolerant of rotor run-out. Later single piston floating caliper brakes are cheaper yet way more forgiving in the real world. If you are going to retain the 4-piston design, you cannot cheap out.
I don't know anything one way or the other about Cardone. Find out if they have stainless sleeves. If they don't, keep looking.
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67 Chevelle Malibu Sport Coupe, Oshawa-built 250 PG never disturbed.
In garage, 296 cid inline six & TH350...
Cam, Toronto.
I don't judge a man by how far he's fallen, but by how far back he bounces - Patton
Yeah when I bought my calipers fro the 'Chief I had to replace 2 of the "o" rings but after that I never had an issue with them and I had 4 of 'em on my car. The car stopped better than my new Ram!! Plus they looked neat behind the Torque Thrust D's I had on.
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"No matter how much you change, you still have to pay for the things you've done".