HELP!! Master cylinder

[68cudahemi]

Ok I have a 68 Cuda that was drum/drum non power.
I've upgraded to a 73 front disc and larger drum rear brakes. I want to stay non power what master cylinder should I use???

 

[Inertia]

RAYBESTOS Part # MC36406 Professional Grade; Bore Size=15/16"

Front Disc brakes; Rear Drum brakes;

http://www.rockauto.com/catalog/raca...&parttype=1836

15/16 bore is the key..

hope it helps

 

[68cudahemi]

Ok what's the reason for that part? Just trying to learn!

 

[Inertia]

The smaller bore gives you more "mechanical advantage" than larger bores,, gives you better pedal feel, less effort..

Some feel the larger bore is like stepping on a rock,.. hard to push, all or nothing feel.. the larger the bore, the harder the rock. lol

On some vehicles changing the rear w/cyls from 7/8 to 15/16 helps as well..

 

[68cudahemi]

Very good! Thanks guys!!!

 

[1967 'cuda]

I did a similar swap/upgrade and inertia is correct. The size of bore in that master cylinder is the is the key. I purchased my brake components through RIGHT STUFF DETAILING @ http://www.getdiscbrakes.com/disc-brake-conversions. They have a toll free # to call for tech advise. (1-800-405-2000) They can make sure you've got the correct master cylinder, brake rod, etc... - and their prices are reasonable. You'll probably want to add an adjustable proportioning valve also.