I would suggest to either take it to someone who does brakes for a living, or do some more research on Huck style brakes. There is too much information that you need which we cannot really cover on a website to make you a savvy brake repairman. Chevrolet Truck Shop Manual is a great place to start.
Carl

1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission