Can anyone tell me the procedure to install the vacuum wiper line from the inside firewall to the windshield wiper motor on a 1931 (B45) coupe. I bought a new vacuum line and it has a short 90 degree on one end and the rest is straight. Also where do the vacuum line clips secure to at the header. Are they installed before the windshield hinge or after? The hinge weather strip before or after the hinge? I'm sure these questions have been asked before but I'm sill puzzled! Thanks to all.