I'm wondering if anyone knows the physical differences in the doors between the 87-91 models, and the 92-96 models? I know that I can swap the front clip from a 92-96 on to my '91, but I'm unsure about the doors. Looking through the broncograveyard.com website, I see there are 2 different part #s, but I can't tell the difference. 87-91 and 92-96 look like the same doors.