Brake booster and master cylinder

[70rtse]

Hi guy ready to run my brake lines in my 70 challenger

What are the best reproduction brake booster and master cylinder to purchace and were from please

[70rtse]

Was going to these rebuilt that came of the car but don't think there correctly for 70 challenger

[dodj]

Was going to these rebuilt that came of the car but don't think there correctly for 70 challenger

While I'm certainly no originality guru, that booster looks identical to what is in my '73 Challenger...so probably incorrect for a '70?
Everything on a '70 is 'one off' isn't it?

[1970 cuda Joe]

Some numbers might help. There's a casting number on the m/c & there might be a number on the booster. I would always rebuild the originals if possible... if they're correct.....Joe

[EV2RTSE]

I think if I were in the market for something that looks close to stock for a 70 and is bolt on-ready to go for not a lot of money, I'd go with this booster-

https://www.ebay.com/itm/135123671906

And then the Raybestos 36307 master as outlined in this thread by JH27N0B-

https://forum.e-bodies.org/wheels-tires-brakes-suspension-and-steering/12/replacement-brake-master-cylinder/31668/msg336625#msg336625

[70rtse]

Spoke to the engine builder and were using a big solid cam he said I won't have the required vaccum for a booster

He suggests running a willwood master straight to the firewall and no booster.

What are your thoughts

[EV2RTSE]

That seems to be what a lot of people go to when running a big cam, maybe also consider a hydro-boost setup.

[Brads70]

I've had this on my car for 17 years now.

https://www.doctordiff.com/aluminum-master-cylinder-kit.html

[70rtse]

Brads 70

Are you running drums on the rear and factory discs up front?

What does it stop like please

[RUNCHARGER]

This is what I have used for manual discs. They stop great with normal pedal effort. I like them because they look stock.
https://nationalmoparts.com/product/1967-70-b-body-70-e-body-hemi-disc-brake-master-cylinder-with-correct-markings-repro/

[70_440-6Cuda]

When I bought my car it had the Wilwood master cylinder direct to the firewall, no booster, with Wilwood front discs and drum rears.  I felt it stopped fine without too much effort, I was actually pretty surprised with not having the booster.  Car also had a big cam / low vacuum

@70rtse  I am selling the Wilwood set up if you are interested...

[Brads70]

Brads 70

Are you running drums on the rear and factory discs up front?

What does it stop like please

4 wheel disc, I have the 1 1/32 size on now, I thought I'd try the 15/16 version as it does stop but to lock up you really need to press hard unless pads are hot but I never got around to it yet. I'm running C-Body rotors and Viper brembo's up front and Drdiff small rear disc kit. it used ford cobra calipers.
https://www.doctordiff.com/rear-disc-brake-kit-10.7-rotor.html

I used the same master cylinder when I had the stock set up Disc/Drum , you just remove residual pressure valve in master when you use 4 wheel disc.

If I was buying this again I'd just buy both sizes to save on shipping, as they are cheap enough....