Hola!

Well I'm actually working on my 71 Challenger. It has stock 71 E-body disk brakes up front. I know of a few late 70's C-bodies lying around and I'm going to try to pick up a set of 11.75 pin style brackets.

But the more I read, it sounds like I'll need more then just brackets. I'll need an adapter from Dr. Diff to run the C-body rotor on the E-body and some other nick-nacks.

Am I wrong? Am I crazy? (don't answer the last one).



Thanks

"C" body caliper mount brackets DO NOT fit an "E" body spindle.
They are to big, and the bolt hole spacing is way to wide apart.
Doesn't work.
You need mounts from Cordobas, St, Regis, Newports, of the later 70's to bolt up.
Same thing with rotors, to be needed from those cars.
They are 1.000 inch thick, and "C" body rotors are 1.250 thick.
C's are to wide for E body spindles.

The later "B" body disc set-ups is what I run on my cars. And I think the slider type is the preferred type. And it seems that the Diplomat discs work, too.

We can still find disc set-ups on Diplomats and such in the pick-a-part yards for under $100 complete.

Diplomat disc brakes are almost basically what thev OP has on his car already.
10.8 inch rotors.
The difference is in the calipers.
E's have pin type calipers, Diplomats have slider type calipers.

Sounds like the op wants to upgrade to the 11 3/4 inch rotors.
Then he needs Cordoba type of brake parts.

I had slider 11.75" on my Barracuda before I tore it down [i'll sell those parts soon] along with late B-body spindles. All worked fine.

I reproduce the late '70s B-body 11.75" caliper brackets AND early/late style slider calipers. These bolt to A/B/E/F/M/J/R body disc knuckles.

I also make a brake kit which mates first generation Viper calipers and 11.75" C-BODY rotors to '73-'75 A-body drum knuckles as well as all B/E body drum knuckles.

Oh I'd love to get your disk brake viper setup. It is just out of my price range. And I thought I saw your 11.75" kit was for the slide style caliper?

But if I wanted to go to a slider style, I'd have to swap over the spindle and get new calipers, etc... I was hoping just to get the adapter bracket and new rotors.

Ok, so I need to find some late 70's B-body aka Cordoba 11.75" Pin style adapters. That should work with the E-body spindle and bolt spacing on each? And from what I've read, the pin style is the better style between the two.

You can simply bolt 11.75" slider caliper brackets and calipers to your existing disc knuckles.

New black zinc plated 11.75" caliper brackets with hardware $90 pair

New, black powder-coated slider calipers with hardware and pads $120 pair

I don't believe pin type calipers offer any advantage over the slider type. In fact, most pin calipers result in fitment problems when performing disc brake conversions.

My '73 Dart had slider calipers on it, but they would rattle and clunk driving on cobble stone road, just like something heavy is about to fall off your car.
Had to rebend and even reinforce the tabs that maintain the calipers a few times, but they still got enough play over time to be audible. (We have a lot of cobble stone roads here).

When time came to replace the 10.9" setup, I just used what I had laying around;
- Late b-body brackets
- '73 Chrysler calipers
- '73 Rotors (11.75" & 1.25" thick)

Just needed 2 shims/washers to space the bracket out so the caliper aligned with the rotor nicely.
And an adapter collar on the spindle to be able to mount '73 outer bearing on the Dart's spindle.

Slider calipers rattle when the brake pad tabs are not bent tight against the caliper, the caliper/bracket "ways" are worn or flimsy hold-down clips are used.

http://www.slantsix.org/forum/viewtopic.php?t=58938&sid=1a849d87949c62c4b1964c1162a01147

Isn't it more then that? Wouldn't it be, adapters, pads, calipers, lines and rotors?

adapters and rotors is it.

Assuming you buy the adapters that match your existing calipers.

Try not to over think it.

But that's what I'm saying. The car currently has 71 E-body disk brakes, which are pin style calipers. He's saying to swap to the 11.75" slide brackets. Which would mean new calipers, rotors, adapters and lines I believe. If I'm wrong, then let me know.

But for the same price of all that, I could just upgrade to the viper caliper adapter setup he has.... which is tempting. I know I can get some A-body drum spindles or probably some E-body ones.

Just get the pin type adapters then.

Not enough difference, imo, between the two styles to warrant the cost of converting.

Other than bling, what does the viper caliper bring to the show that isn't being addressed by the stock calipers?

Nothing.

That's what I'm saying. If I go and get slide adapters, I need everything that goes with them. If I am getting everything anyways, for a few extra dollars I can get the viper setup.

But if I get the 11.75" Cordoba pin style adapter brackets, all I should need is the adapter and rotor I believe.

Correct

Question: Are the pin-type calipers from the OP's 71 properly dimensioned to mount onto the brackets for the 11.75" rotors?

I have a '72 pin type disc setup on my Challenger, along with the later large-bearing-spindle (73-up) sitting aside now (thank you 71hemigtx), so, I believe the OP and myself are in the same situation. I want the 11.75 discs but would prefer the pin-type calipers instead of the slider-type calipers. Can the 71/72 pin type calipers be used with the larger 11.75 discs?... with the proper bracket?

I've considered the Viper front setup and recently tried various rims on that setup (thanks again to Sublime 70 Charger!)... too tight for my rims and will NOT fit with factory steel Mopar ralley rims!

From what SuperCuda is saying above, if we get the 11.75" adapters from a later model B-body. The caliper remains the same. All we have to do is get the rotor and the actual adapter. From what I can see, it is any 76-79-ish B-body like a Cordoba or Magnum.

Ah, hold on a second.

I don't think there is a difference between the the early and later pin calipers, but I am not an E or a B body guy and I don't know for a fact.

MoPar Action's swap guide doesn't seem to say one way or the other.

One other mandatory part on this swap, 15" rims.

I don't know what the Viper stuff costs, but even IF the change was made from pin to slider, the additional parts wouldn't cost that much money. Reman calipers are $25 each, pads would run about $20, and hoses are $5 apiece, so $80 more to go to the pin type.

Of course when I pull that stuff in a pick-a-part yard, it all comes with and usually costs $50 to $75 a side. And that includes the spindle and rotor. Sometimes, it is even fairly new reman stuff.