Brake upgrades for 1974 Grand Prix

[Skip Fix]

There are hybrid bearings for the outer that would allow the 12" 1LE rotor to go on an early spindle but the caliper location on the integral cast bolt holes only spaces the caliper out for the smaller rotor.

I thought I saw somewhere someone found a supply of the 12" spindles. I bought 2 sets from GM a couple of years ago used on on the '81.

Also a dual piston Wilwood D52 caliper will bolt up in place of the single.

[cornfedbill]

Also a dual piston Wilwood D52 caliper will bolt up in place of the single.

I used '74 C10 calipers because they have 2-15/16" pistons - and they are cheap and easy to find. They fit the large 1-1/4" thick 12" GM rotors.

[badbu68]

I have the whole 12" B body spindle brake setup brand new on my 68 chevelle. I sent you a pm.

[TQuillen]

I used '74 C10 calipers because they have 2-15/16" pistons - and they are cheap and easy to find. They fit the large 1-1/4" thick 12" GM rotors.

Bill - is there a 12" rotor that uses the SET6/SET3 bearing combination that is 1.25" thick? I thought the only 12" diameter 1.25" thick rotors were the truck rotors?

C3 Corvette, maybe?

[cornfedbill]

Bill - is there a 12" rotor that uses the SET6/SET3 bearing combination that is 1.25" thick? I thought the only 12" diameter 1.25" thick rotors were the truck rotors?

C3 Corvette, maybe?

The C3 Corvette rotors are the right size. That's what I have. Only issue is they do not have a hub. I used drum brake hubs. I've heard of people cutting the rotor off the center to get the proper hub to mount a rotor.

I cannot answer the bearing question. I have not had to cross that bridge.

[Skip Fix]

1980 C10 uses those bearings for the front rotor. Not sure if the width between them is the same as the B body spindles take.