Found this on YouTube today. My apologies if it has already been posted, but maybe some other newer folks here may not have seen it. I'm still not the best on determining the year of a specific Patrol, but this one does have three vents. Enjoy!
EDIT: tried to use the youtube function but it wouldn't hyperlink the address, so there is a URL below it. Not sure why I couldn't get the youtube function to work.
[youtube]https://www.youtube.com/watch?v=-owBz2vyNJE[/youtube]
https://www.youtube.com/watch?v=-owBz2vyNJE