I have adjusted my drum brakes to the nth degree, but the car still pulls or skids the tires in a hap-hazzard way if you have to brake suddenly.  Sometimes it will move over a half lane, and that is not safe when trying to keep up with traffic at 65-70 mph.  I have new Wilwood disc brake conversion kit for front brakes, and just want to know what master cylinder you have had good luck with on your conversions?  I really don't want a booster for power brakes, but would like to keep them manual for now.  I have converted older Mustangs for manual disc brakes and they worked fine, even my Mach I race car had manual disc brakes.  They worked fine with a line-lock and stopped the car easily at 10.9s and 123mph.  Joe-JDC 

JDC