New disk brake

[64shortbox]

64c20pickup,
I had the exact same problem with my 64 C10. I ended up making a home made pressure bleeding setup. Here's a link as to what I did - post #6. https://67-72chevytrucks.com/vboard/...d.php?t=633937 I'm pretty sure I still have everything if you need to borrow it. PM me if you want to borrow it.

I tried everything in the book to get my brakes to bleed properly & nothing worked except my home made pressure bleeder. Even then I read you only needed about 5 PSI to get the brakes bled but I had to crank up the pressure to 25PSI to get mine bled. This was almost 10 years ago so my memory might be a little rusty. I used a 73 C10 master cylinder on my truck if it makes a differance.