disc brake question

[70-duster]

I was wondering if all a-body disc brakes are the same, with the exception of the small bolt pattern and big bolt pattern. The reason I am asking is because i just purchased a complete set of a-body disc brake parts at Mopar Nats and forgot to ask what year they came off of. It was so hot and the price was awesome, and I got excited and forgot to ask. I know it is the small bolt pattern, but was curious if there were different ones. I have a 70 duster that I am putting these on. Will the late 60's barracuda ones still work?

 

[hemi71x]

Small bolt pattern Kelsey Hayes disc brakes were used on the A body cars from 1965 to 1972, so it doesn't matter what year they officially are, they will work.

 

[caferacerx]

small bolt are 4 piston caliper
big bolt are single piston caliper

 

[trapster]

are the 4 piston calipers still insanely expensive to rebuild ?

 

[abodyjoe]

are the 4 piston calipers still insanely expensive to rebuild ?

Compared to 73-up yes.

 

[DonnieLawson]

Isn't the 76 A body a larger piston then 73-75 ?

 

[hemi71x]

Isn't the 76 A body a larger piston then 73-75 ?

A 73 74 75 caliper piston measures 2.600
A 76 caliper piston measures 2.750

 

[Vs29H1B]

are the 4 piston calipers still insanely expensive to rebuild ?

Why spend on a rebuilding kit when you can buy rebuilt Kelsey Hayes SBP units for $60?

 

[trapster]

Why spend on a rebuilding kit when you can buy rebuilt Kelsey Hayes SBP units for $60?

Because I didn't know I had that option
Thanks