take it out in the rain and drive it. where the water comes in is where the air comes in when the sun is shining. get new glass, rubber and a tube of 3m sealant and do it your self. get the rubber from steele. repeat first sentence and tweak from there. one of the nicest attributes of this vintage is the crank out window. more noise and air comes from the doors unless you have the seals.
i think with a one piece window it will pop out when the cab flexes
