Hi Jerry firstly welcome.
Sounds like you've got a fair bit of work ahead of you.
First and foremost,make sure your door gaps are good and they fit well.
Then I would brace the cab before you do anything else.
Here's a link to one of our 'resident experts' photo documentation of a cab resto.
He pretty much went through the replacement panel catalogue with his...
Cab restoration by Woody. I'm sure there's quite a few folks here who have been helped by this.
Good luck.
Jock