This may or may not be pertinent, but I noticed that doors from the same year, but made at different factories were as much as 1/4" larger than the ones I had. So, these vents, if they weren't made at the same factory, might not fit exactly right. I was very surprised by this, but that was the technology of the time. I actually had to cut my cab and remove 1/4 of an inch to make my doors fit. Amazing. So, don't be surprised if other parts have the same problem?
