You need to definetly inspect the entire system-I get the impression from what you describe that you may have stuck pistons in the front wheel cylinders. Take off the drums and use a small screwdriver to push on the piston pushrods on both sides of the wheel cylinder. They should move with little force. Adjustment could be an issue as well, they didn't use self adjusters until the mid '60's. The front may not be adjusted up enough. Also the correct sequence for bleeding a TF 1/2 ton is -LR-RR-RF-LF, you always start with the cylinder that is furthest away hydraulicly. I would suggest getting a shop manual before you attemt repairs so that you will familiarize yourself with the systems in your truck. For a '59 you will need the '58 manual and the '59 supplement to get all the information.