I have a 51 Chevy 3100 which came with door vent windows. I want to change it to the older 47 style larger glass with no vent. If I take out the vent frame will the door glass of a 47 fit in that 51 door and will the window regulator work or will it have to be changed??? I know the glass channel will have to be ran all around the window opening but is that as easy as it sounds or not?? It seems that the doors are the same except for the vent frame but I am not sure what else has to be done. thanks!! slowgoer