Brake ? for my 71

[az's1971C10]

Hello Everyone,

I have a brake question that maybe you guys can help me out with. I bought a 71 SWB with a 4 speed Saginaw for my daughters first vehicle and today was the first day we got a chance for her to drive it. She has only driven my Ram 2500 HD and our I35 which are both AT's in parking lots since she is only 15 and doesn't have her permit yet.

After a few minutes of showing her the pattern of the 4 speed, off we went and she did pretty well for her first time driving around in a parking lot. After 45 minutes of this I could tell both her and the C10 were getting frustrated with each other so I took over and drove home. Well as soon as I hit the road the "BRAKE" light came on and my brakes were squishy to say the least.

I took it home and checked the master cylinder and noticed that brake fluid appeared to have leaked out and I assume it boiled over. When I opened up the master cylinder it was only half full. I refilled with fluid and pumped it several times and got the brakes back to where they were before.

So to make a short story long, what are your thoughts on preventing this issue again?

Here are the Stats on her truck: 350 with PS, Front Disc, rear drum, Non-AC for now. If I can figure out how to post pics of it I will.

Any suggestions would be helpful.

Cheers