I checked into my door vents this morning. Hmmm, after taking a closer look, there is a fine mesh covering the inside of the vent in the lower door panel. Well, after 20 odd years that mesh(like cheese cloth) was about plugged shut with dirt/dust. I just tore the cloth loose on the bottom to allow it to move around and let air pass through(like a door flap) and wow.............the doors close much better with the windows up. I need to address the passenger door and likely will really help more.

 

Got it Freightrain! :)

Popped riveted (like I meant business;) a piece of 1/2" square pipe inside
the door shell...


Lined it up with the extra screws I'd put in to hold up the flimsy pocket so
now they actually have some "real metal" to screw into...

Check out those two extra screws in the carpet they made a big difference
in how sloppy the pocket is and have another screw in the front-end too.

Also added a couple more braces...


Those felt like they added strength to the door skin but wasn't so sure until
after I worked on the passenger door and installed those first! LOL :)

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And fixed the squirrelly feeling door handles too, while I was at it...



It now sounds nice and solid like my '75 150's doors.
And the door handles feel like they're actually screwed down to something.

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Now onto the flimsily-held-on plastic door panels! :)

Thinking about jack-nuts and screws along with filling their empty "hook
pockets" in the door panels' Christmas tree sockets so the jack-nuts'
machine screws won't smash the crap out of 'em. ;)

The door panels are glue-able plastic so there's lots of ways to go there. :)

Alvin in AZ
ps- Gotta do something with the armrest frames....

...need a new thread for those sorry things! :(
Guess which one of those armrests is from the '75 parts truck. ;)