Converting from Power to Manual Brakes

I did this conversion already. I just used a new master cylinder from Autozone. They had the part listed for my car. The pushrod is different though (shorter for manual), you'll have to ask around like I did to find one.
If not you can use this complete kit: http://www.reillymotorsports.com/store/product.php?productid=16200&cat=273&page=1
Or just the adaptor for the longer pushrod:
http://chucker54.stores.yahoo.net/mamacyadnst1.html

Good Luck !!