Brake Light On, Pedal Feel not Right, Front Brakes not Bleeding Anymore

[badpeanut]

When I bought my '72 Chevy 4x4 the brake pedal went to the floor and both the rear reservoir on the master cylinder and the rear wheel cylinders leaked. I replacing those and the rear hard lines from the rubber Y to the wheel cylinders (they were rusty and I damaged them disconnecting them front the wheel cylinders). After bench bleeding the master cylinder and vacuum bleeding the lines the brake pedal felt okay so I took it out on my gravel road and sneaked out on the highway. Brakes still didn't feel 100% so I went home and looked things over closer. There were some burned out lights in the cluster (one being the brake light) so I replaced them and now the brake light is on.

I vacuum bled some more and couldn't get the light to go out, so I had my wife help while I opened and closed the bleeders. The rear brakes seam okay and push out lots of fluid. The front brakes don't push out much fluid and the pedal has gone soft again. Now with the vacuum pump I can't get any fluid out the driver's front and very little out the passenger's front. I pulled out the front bleeder screws and verified they aren't plugged.

I don't have enough courage to drive it until I get the pedal feel back.

What should I check next?