I have a disc assembly from a '73-76 A-body that I'll be putting on my '71 B-body and I'd like to know if there's a way to upgrade?
Jim

Only two sizes of rotors fit that I'm aware of. You can buy the brackets and step up to the larger rotors.

Not sure if anybody makes performance brake pads, but that may be another way to add stopping power.

What brackets? Can I get them from a bone yard? if so what vehicles?
Thanks,
Jim

You can find the adapters off junkyard cars or on ebay.

http://www.moparaction.com/Tech/archive.html

I have pulled 2 sets at junk yards both were in 77' cordoba's

Post deleted by moparts

& you can get performance pads. I have the 10.87" stock slider 73 A setup(the smaller of the 2 factory sizes)with 76 A calipers which have a 5/32"(2.75" vs 2.60") larger bore than 73-75 calipers & it's very inadequate. I was wondering if I had done a bed in procedure if that would have made a big difference.I forgot what kind of pads I used but they ain't cutting it.

yes,caliper brackets and 12" rotors from a r-body

brackets bolts on the A-body spindle

mid 80s cop cars and gran furys,dippys,5ths are the R-bodys

I just scored a spindle assembly from a late model A-body that already has the adapters with the 11" rotors. I just need to figure out which side goes where.
Thanks,
Jim

they'll go on eithe side depending if you want your calipers front or rear hung I would mount them on the opposite side of the brake line/hose bracket unless you need them rear mounted to clear a sway bar.

I have a factory sway bar,so the calipers should be on the rear side?
Thanks,
JIm

you want them on the opposite side of where the hard line/hose bracket is just like the factory setup. IF you have to rear mount them because of sway bar clearance problems all is well if your brackets are in the front(I dont know B bodies) but if the bracket is in the rear & using a rear mounted caliper it MAY take a custom hose. With the tires on just go from lock to lock & check for clearance/interference. Other than that fit/function/alignment is the same. EDIT since you already have the smaller 10.87" setup for sure checkout some aftermarket pads & ask for 76 dart calipers for the bigger bores to get more front bias & follow their breakin procedure. I've been in vehicles where they took the time to do the breakin for the pads & it's quite a difference in stopping power.

my bad

you can find some of the M-bodys with the 12" rotors also then

I have the adapters from a '76 A-body for 11' rotors, will these be big enough? or should I keep looking for the larger adapters?
Jim

Jim my I would find some of the larger adapters & 11&3/4" rotors. I know my 10.87"'s on a daily driver early A body ain't enough & the increase in the lever arm with some better pads & a breakin peocedure should make a heck of a difference for you.

yes get the larger bracket for the larger rotors

seemed I got a set off a dippy police car with the cop rims also

the last ones I got where 88 gran fury police car and got the 360 headed 318 4-v to boot,it was a slider cam with a roller block

the large rotors and 11"x 2.5 brakes,large bore wheel cyl on the back with the adapter for a large bore 79 truck 2 bolt alum mc worked killer on my 68 A-body manual brake car


I also cut some aluminized exast tube,1.5"-2" tube with an angle to make air scoops and cut a hole in the dust sheild below the ball joint,then welded them on,tucked up there and in the air stream for max cooling

worked great for cooling the front rotors while auto-xing