Stock 73 E-body 8.75 rear drum vs dr diff kit?

[carcrazyguy]

What was the size of the rear drum brakes on the 73 E-body 8.75 rear ends?  Were they larger than the rear brake kits that Dr Diff sells? 

http://www.doctordiff.com/mopar-10-x-2-1-2-drum-brake-assembly.html



Trying to decide on buying each piece to rebuild the brakes on the rear end or ordering the full assembly from Dr. Diff when I order the front 11.75 disc set up and the 8.75 center section.

[Chryco Psycho]

10 x 2.5" would be the stock size , , if you use the truck wheel cylinders [different diameter]  the rear brakes will not lock up first with front disc

[carcrazyguy]

 So you are suggesting that I purchase the truck wheel cylinders if I go back with either the stock of dr. diff drum kit?

[crash340]

What year and model Truck should I aim for when Im on Rockauto's web site Neil please. My rear brakes lock up if im breaking into a corner, straight line they are pretty good

[bc3j]

I used the 13/16" wheel cylinders from a '91 Dakota with 10" rear brakes. The Dakota with 9" brakes has a 7/8" wheel cylinders.

[Chryco Psycho]

Check with Brad , he used a specific wheel cylinder , easy to get

[brads70]

I used the truck wheel cylinders when I had drum brakes. Worked great with no lock up before front wheels locked up Stock bore is 15/16" and the trucks is 7/8" (Raybestos WC37236, DORMAN  W37236). 
I now have the DrDiff  rear disc kit ( small) works great too. 

[crash340]

Brad, were they are direct bolt in item to the Mopar E body back plate and line?

[bc3j]

Mopar Action June 2013 had an article on drum brakes and the cylinders. The article had 3/4", WC37863; 13/16" WC37696; 7/8" WC37236. Mine were direct bolt ins with the exception of the bolts which needed a different thread count. I tried my OEM bolts and they didn't thread correctly. Don't know what's up with that. Everything did line up correctly.

[brads70]

Brad, were they are direct bolt in item to the Mopar E body back plate and line?

Yep!

[dodj]

With how light the rear is on these cars, ie the stock drums locking up early, what advantage are the discs. I seem to think we don't need to improve the braking ability of the rears? Or is it an unsprung weight thing?

[brads70]

With how light the rear is on these cars, ie the stock drums locking up early, what advantage are the discs. I seem to think we don't need to improve the braking ability of the rears? Or is it an unsprung weight thing?

"Bling" and pad selection 

[73restomod]

Disc vs. Drum, comes down to use, specifically frequency, if you got a daily driver that's driven briskly occasionally than stick with drums, you would be ok even with the occasional hot lap at the autocross. When disc would be mandatory, in my opinion, is when you will be doing multi-hot pass racing where consistency would be beneficial to both lap times and safety.

[crash340]

Wow, rear brake lock up must have been worse back in the day with the larger 11" rear drums, kinda glad I only have the smaller!!

[GoodysGotaCuda]

As one that likes to trail-brake, I will feel a little more confident and more consistent running rear discs. I've never cared for drums in applications other than parking brakes or econo cars. 

...not to say you can't race when them, I just prefer not to if I can help it.