after installing the new cab and putting everything back together. i found that it is now impossible to push the brake pedal down, like solid as a rock... i put one new front line on because it was broken. any idieas?

 

The beer you filled your master cylinder with froze.

Check for vacuum.

 

maybe check for a bind in the shaft going to brake pedal ? or a pinched line some where just do some double checkin you will find the problem .

 

Wouldn't be beer in the lines. We use rye around here. That stuff. Never freezes