Thanks for posting the pic's! It's indeed a great looking truck and I hope you get your "issues" sorted out and addressed in the right way for the long term. Also, I'm overjoyed to learn you're into this at 28!!
Same as Mike, I looked at the pictures showing the tonneau cover and thought, "I've seen this before, isn't that the louvered radiator outlet?" (Link to earlier thread - incredibly hot engine bay temps, need advice or suggestions 41 Willys 350, pics insid ) Did you get your overheating problem solved, and if so, what did you have to do?