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**Captainfab** · 08-01-2012, 10:58 PM

That Autozone link does not specify which thickness rotor that caliper is for. An '84 could have either the 1" thick rotors or the 1.25" thick rotors. I'm pretty sure the '78 only came with a 1.25" thick rotor. You want the D52 caliper for a 1.25" thick rotor. One way to ID a D52 caliper is that the center to center of the slide bolts is aprox 7" and typically has a 2-15/16" diameter piston. The JB/JD7 calipers have a 3-5/32" diameter piston.

08-01-2012, 10:58 PM	#242
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,246	Re: D52 Caliper Rear Disc Brake Brackets That Autozone link does not specify which thickness rotor that caliper is for. An '84 could have either the 1" thick rotors or the 1.25" thick rotors. I'm pretty sure the '78 only came with a 1.25" thick rotor. You want the D52 caliper for a 1.25" thick rotor. One way to ID a D52 caliper is that the center to center of the slide bolts is aprox 7" and typically has a 2-15/16" diameter piston. The JB/JD7 calipers have a 3-5/32" diameter piston. __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE