Vent box hinge - 1966 Plymouth Valiant

Different after 66... The main difference being that the 67 and up boxes are bolted to the cowl with 3 nuts and the early box hangs from wire rods hooked to the flange of the co. The door on the drivers side is also rounded on the corner on the early cars where the later cars have angled corners as pictures above. I have an extra box with a good hinge but its seized as of right now!! I have been spraying and heating, spraying and heating trying to baby it open. I have one pin free and am still babying the other. Message if you're interested in taking over the babying!! Geof