I just bought a door from a 87 suburban...for my 87 k30... I couldn't get it to fit. I can slip my hand in between the window frame and the rear cab pillar...and there is NO gap between the windshield post and the door. Since I had anouther door... I tried that...and had NO problems. I thought 73-91 trucks used the same door....WTF!!!! Anyone run into this before???