When using the pump and hold method, push the brake pedal slowly to induce the pressure.... rapidly pumping the brake pedal during brake bleeding could cause aeration of the fluid within the master cylinder.Once I get more fluid I'll probably continue the bleeding process using the pump and hold method.
Just for your reference, I have a '63 with manual brakes, S10 disc in front and drum in rear. I am using a 1969-ish Corvette 1" master and it's just right. I also have an adjustable proportioning valve in the line going to the rear brakes. Do you have disc in front and drum in rear? Are your drum brakes properly adjusted?The putty definitely sealed up all the leaks. It would hold 20 in of hg no problem. After I vacuum bled each corner very thoroughly I manually bled each corner with the pump and hold method. I bled about 6 pints of fluid through, maybe more. The pedal never got firm as I was expecting. The place I bought the kit from was very very helpful. He explained to me that with a 7/8" master I can expect a longer stroke and softer pedal. I may need to move up to a 15/16" master. Unfortunately this time of year is pretty yucky in WI so I won't know till next year. Rats
I think that's where I'm headed. Couldn't move my hand after Mighty Vac. I was sucking air forever till a realized it.