Hi all,
looking to switch to a power brake setup for my 71 chevelle. I know there are a few different types of master cyl's/boosters. Would like to know what one will fit, or not fit.

My car is a 6 cylinder, with drums all around. Currently non-power brakes.

Thanks in advance.
Greg

Take a look at the special forum for brake conversions; it will have all the info you need:

http://www.chevelles.com/forums/forumdisplay.php?f=38

And you could take a look at the Tech Reference section for more info. This topic has been covered very thoroughly here. Just do a bit of a search and you will find a lot of info. Also read through the Steering & Suspension forum for more info on brakes. There is a lot here.
Good luck with you project.