Hi Joe,welcome from Scotland.
Your truck looks to be in reasonable shape,so don't be disheartened by the rust,there's a few folks here started out with a lot worse!
The Stovebolt is a great place to gleen info and advice and there's a good number of Texans frequent this site.
How many are in the Dallas area i'm not sure but they are out there!
What the gang here don't know about these trucks ain't worth knowing anyway!
Good luck.
Jock.