feets what are the other diameters of the bearings? maybe make a cup to seat the small b body bearing that will press into the rotor?

I did this 5 years ago. Works great! Mitch , it fit with my 15" minilite wheels too. You will need the one year only spindles though ( 1973) And they are desirable and expensive usually. Relatively speaking....
http://www.cuda-challenger.com/cc/index.php?topic=73985.0

The problem is the spindle. It has a smaller diameter on the outer bearing. You either have to sleeve it from .750" to .8661" or find a bearing with a smaller ID.

My first generation Viper on 11.75" brake kit is back in stock.

It fits B/E body drum knuckles and '73-'76 A-body drum knuckles. Because it uses 1.25" thick C-body rotors, pad spacers are not required.

'72 and older C-body rotors fit '72 and older B/E body spindles.

'73 and newer C-body/truck/van rotors fit '73-'76 A-body spindles with a simple bearing spacer I supply.

BTW, '72 and older C-body rotors will fit '73 and newer A/B/E/F/M/J/R body spindles if you install Set 13 inner bearings in place of the stock Set 6 units.

I never looked for a small OD/large ID seal to make this combination work, however.

69-72 c body rotors are not a cheap item - aprox $130 ea and not a lot of choices

If you can get some worn ones, you can remove the disc from the hub and replace them with some around '75 vintage ramcharger/w100 4wd front rotors (raybestos #7036r, $29ea @ rockauto), you will need new studs too. Hubs may need machining to make it square - the factory would have you fitting them to the hubs and then machining the disc, screw that

So, significantly cheaper rotors and you can get drilled and or slotted ones cheap if that floats your boat ($90 a pair on feabay)

It is very hard to find calipers that exceed the surface area of the 2.75 piston brakes, there are very few out there and unless you -really- need to shed weight, get some, paint em red and feel happy that your factory parts are better on paper than a new set of willwoods

73 and later rotors are the same size and are available from $35-$65 each on Rock Auto.




I've done that but not with that rotor.



Factory brakes are good and floating calipers are easier to package. However, you can gain brake pad surface area with larger fixed calipers.

Replacement '69-'72 C-body rotors are 1 piece castings, identical to the '73 and newer version with the exception of the bearing sizes.

I sell drilled/slotted/plated rotors, but the plain version is available for $100 each.

http://www.summitracing.com/parts/ben-prt1047/applications/

So can anyone tell me which bearings and seal to use 73 rotors on the 71 c body spindles?

'73 and newer rotors will fit '72 and older spindles if you use Set 16 bearings, DoctorDiff outer bearing adapters, Set 17 bearings and DoctorDiff inner bearing adapter/seal kit.