Four wheel disc. what master cylinder to use?

[chevyrestoguy]

I am planning on putting rear discs on my '73, and I have read through the threads from the guys using the Cadillac and Impala setups. I have seen lots of posts about what master cylinders guys are using, and they are quite varied. Some have used the stock disc/drum units, some use the ones from the donor vehicle (caddy or impala), others use aftermarket. I want this to look like the original setup from '73, so would a '68-81 Corvette disc/disc master cylinder work? I am amazed at how cheap they are at NAPA. I understand that the key to making it all work right lies in the porportioning valve, and I'll definately use the correct one there, but I don't care much for the look of the later master cylinders with the plastic reservoirs.

Would the 'Vette one work? If not, any other suggestions that are not budget-breakers?