WTB Drum Brake Cylinders and Master

[pschlosser]

I'm looking for oem front and rear drum brake cylinders, and a drum master cylinder for a 1970 barracuda.  But these components were also found on B-bodies during 1970-1972. I'd prefer ones in need of rebuilding,  since I'll want to tear down whatever I find, for inspection, any way I slice it.  But pretty ones are welcome, too.

[EV2RTSE]

I still have this master cylinder, it came off of a 70 Challenger-

https://forum.e-bodies.org/parts-misc-for-sale/9/1970-bendix-drum-brake-master-cylinder-2660809/28005/msg312577#msg312577

[mtull]

I have two rear wheel cylinders.  I disassembled one for your review.  I believe the casting number is correct for mid 1970 and later for both ten and eleven inch rear drum brakes (please double check, it's been a while since I researched the topic).  $20 + shipping.  Please send a PM if interested.

[Mr Cuda]

I have drum hardware I won't use.
  I cannot put drum on anything and hope to drive it.
 70-71 front wheel cylinders have a rectangle mount boss.
 I would think all cores would require being sleeved. Used ones were pitted 40 years ago, which is why they were replaced.
 Now ask me why I have them?

[mtull]

70-71 front wheel cylinders have a rectangle mount boss

@Mr Cuda if I understand you correctly then the front wheel cylinder I posted a picture of would be incorrect for an E-Body?  If so, thank you for confirming.

[Mr Cuda]

mtull the football boss was pre 69 11" front. Not sure but i think 10"
was rectangle.
 I saved those because they got hard to find in the low repop years

[Mr Cuda]

A sample of stuff. All northwest, no pitting.

[pschlosser]

I need to inspect the rear backing plates to confirm which style I want.  I'll try  to do this, later today, when it warms up some more.  Football or square.  This is on a 1970 8-3/4 rear end car.

[mtull]

Football or square

I believe @Mr Cuda was referring to front wheel cylinders. not the rear with regard to the two different styles. 
 

[pschlosser]

I need to inspect the rear backing plates to confirm which style I want.  I'll try  to do this, later today, when it warms up some more.  Football or square.  This is on a 1970 8-3/4 rear end car.

No, it doesn't appear to be the "football style".

[Mr Cuda]

Rear only comes one way, with the "mouse ears" shape in the backing plate.
 Fun fact, you have a mid to late production date build with those mounting bolts.
And likely a 346×××× wheel cylinder is correct for it.
I hope its all 11"

[pschlosser]

Rear only comes one way, with the "mouse ears" shape in the backing plate.
 Fun fact, you have a mid to late production date build with those mounting bolts.
And likely a 346×××× wheel cylinder is correct for it.
I hope its all 11"

Thanks for that tip, Mr Cuda.  No, I think its 10-drums in the rear.  I may have to go pull the wheel and look, now.  And I believe the car is an early production date, Oct/Nov 1969.

[pschlosser]

And likely a 346×××× wheel cylinder is correct for it.
I hope its all 11"

Thanks for that tip, Mr Cuda.  No, I think its 10-drums in the rear.  I may have to go pull the wheel and look, now.  And I believe the car is an early production date, Oct/Nov 1969.

I just measured the rear drums, and lo and behold, they're 11-inch drums.  For months, without even confirming, of course, I thought they were 10-inchers in the rear like some 318 E-bodies I've worked on.

How in the blankity-blank did you know they were 11s?  I'm seriously impressed.  Good call and well done.

[pschlosser]

Well, shoot.  It looks like I need the press-thru mounting bolts of the M/C to the cowl.  If anyone has a dimensions on these bolts, I may be able to find some alternates.

[brotow]

I have 2 master cylinders one is from my 70 Challenger manual brakes, the other not really sure.