I am old enough to have seen and ridden in EBs when they were new. They rattled.. They whistled.... The rear hatch seemed to show light through them in places. The early Broncos were never meant to do anything much other than work and get you to places a normal car couldn't. Body gaps??? hehe. Ever looked at almost any vehicle from the 60s and 70s? MOPAR was probably the worst. If the doors open and close and seal fairly well without loud wind noise, you are pretty close to what they were new.