Let's talk about brakes !

[Goober]

As I was goofing around under the hood of my 1978 Suburban yesterday I notice I had some fluid leaking from my master cylinder right where it bolts to the booster. Time for a new one!

Since the master cylinders are so cheap for these trucks ($12. - $40.) and parts interchange all over the place, what would be the best option?

Currently I've got the "standard" lightweight 3/4 ton running gear (d44 - 14bff) and I'm planning on putting disk brakes in the rear someday (when I have more that $1. in my pocket ). My initial thought is to find a master cylinder with the largest bore piston I can find and huge reservoirs. Is this a good idea, a waste of time or potentially dangerous?

What about changing to the newer style master cylinder with the aluminium block and plastic reservoir? Is this a better design or a piece of crap? Will it bolt onto my booster?


Ideas?

Part numbers?

General recommendations?

 

[ntsqd]

From the various previous threads on which m/c to use with rear discs I'd use the stock replacement m/c.

Do not mess with the bore size unless you have a specific reason to do so. Only point of an aluminum m/c w/ plastic reservoir is to save weight.

 

[R72K5]

bore size of mastr cylinder depends on gvw of truck, IE bigger springs option usually always meant larger brakes option, in which means larger piston diameter in master cylinder and i dont know that master cylinders with different bore diameters will interchange beween different boosters, Ie boosters that had master cylinder bolted to them with a different piston bore diameter than another,

would depend on if pilot bore hole in the boosters are all the same or not, in which i am unsure, hmm..

good luck