'66 B-Body disc brake conversion

I know it is here somewhere, but I cannot find the article or previous link. When I bought my car 7+ years ago, a '66 Coronet, I bought new '73 up spindles, backers, upper control arms, etc. What I cannot seem to find is what Master cylinder to use on the car. It has power Drums all the way around, single reservoir. I think there is a direct bolt on (Master is a 4-bolt). Can anyone point me to the correct part number to use? Assume I will also need a prop block

I just finished the "A" body disk conversion on my '64 Polara. For the best performance the master cylinder needs to be the same one used for the calipers you use. In other words... if you use calipers from a '76 Dart, use the master cylinder from the same car. No guesswork needed if you go that route. Doesn't matter which year calipers you use, just make sure the master is from the same year, so it will be sized correctly. And don't forget to use a proportioning valve so you'll have proper bias.

I did the same disc conversion to a 64 Belvedere wagon that was power brakes. I used a master cylinder that was for a 70 Roadrunner with power brakes, and a prop valve from same. The car would stop on a dime and give you 9 cents change!