[Hans (72challenger)]

Hey all,

My friends 68 cuda has power brakes with discs in the front. Only, cause of his cam he does not have enough vacuum for a good power assist. Because of that my friend wants to go manual, so he needs another master cylinder. But as far as he know chrysler didn't make any manual braked cars with discs in front. ***** did, so he's thinking of buying a master cylinder for a 'vette and install that one with an adapterplate. Only there shouldn't be any ***** parts in a Mopar so if anybody know a good solution for this please let me know. I like to know it also cause I will have the same problem when I dropped in the 440. BTW, we already considered a vacuumcan? but that won't give enough vacuum cc's.

Thanks for any input!

[Christer (Christer)]

Calm down, Hans! There is no need to use •••••-parts!

Part number 2808600, for instance, was used in 1967-1969 Barracuda, 1967-70 Dart and Valiant and 1970 Duster in BOTH power- and nonpowerassisted applications. In other words: The same master cylinder is usable even if you remove the brake booster.

Important to keep in mind: A master cylinder that fits disc brakes will not interchange to a car with drum brakes! Have a nice rubber-burning weekend!

[Dave-R (Roppa440)]

You can also fit a more modern light weight version like the one in my car. Remember I have manual disc brakes too! The modern one needs an adaptor and a little engineering though.

[Dave-R (Roppa440)]

Also read the 'Swap & Stop' post in this section.

[Hans (72challenger)]

All right, thank you guys! This will mean my friend can keep using his excisting master cylinder without the brake booster on his 68 barracuda. That's a lot better then •••••-stuff!

Dave, did you make the adaptor yourself? what engineering have you done to change to manual brakes. Right now I'm just on the edge with my power assist and cam, but the cam I want for my 440 will suck up even more vacuum, so I plan to go manual. Gives a cleaner look at the engine compartment too.

No rubber-burning weekend for me this time Christer, I will take a 'diesel' to go to the show this weekend. My challenger is at the bodyshop right now getting a new paint and some other bodywork (bought from 'Alblas' Robbert!) but it will be back on the road in a week or two.

[Dave-R (Roppa440)]

You can fit a correct cast iron master cylinder. they did do them for manual disc brakes. But if you really want to fit a modern lighter one then see my separate post on this subject.

[Christer (Christer)]

I guess most of you guy´s don´t think that new cars are very fancy and I hope I don´t insult this message board too much when I write a short note about a new car:
Nothing is what it used to be. A diesel engine certainly does not need to be slow. I hardly could believe my eyes when I read that Mercedes new 4.0 litre V8 diesel engine gives 560Nm between 1700-2600 rpm. That is enough to burn a lot of rubber, I think. That is enough punch to take a
1970 kg car from 0-100 in 7.8 seconds!! Yes, the car is NOT cheap....
(Hopefully, I am not excluded from this message board after this....!?)

[Ron Allan (Ron)]

I have been told that if I want to change my 72's (440 with a .509 Lift, 292/292 duration cam therefore probably poor vacuum)manual drum brakes to disk brakes that I would also have to go to power brakes. From reading the above thread this would appear not to be true. Would anyone out there with manual disk brakes give me their opinion as to how they feel, behave, perform as compared to manual drum brakes?