Anyone know what is the best direct fit replacement for a factory single one? Don't want anything with a booster...
68-73 Chevelle, Nova, Camaro with manual drum brakes is one. One for a 70 Vette with manual brakes would be the other and more preferred choice as it has a larger reservoir if front disc's are a future plan. Both of these app's are 1" in bore as needed for your app.
Classic Chevy does a kit with all you need. Relatively inexpensive, and all the parts are provided. Did my 56 Chevy a few years ago after a rear wheel cylinder blowout going downhill into traffic. Cheap insurance.
Here's a thread that should help, http://www.chevytalk.org/fusionbb/showtopic.php?tid/259644/ scroll down about half way for everything you'll need ..............read the entire thread as well, one fella had probs and another didn't.......YMMV
I used a 71 Nova master, but with a booster but the bolt pattern is the same. Just about all Chevy masters fit all Chevy firewall mounting screws/ studs. Make sure you get one for drum/ drum.