There you go, new thread, new ideas, since I'm relatively new I want to get some ttora shirts so lets come up with a design!!Keep the ideas flowing. In fact I think a new thread to stir shirt ideas would be a good idea.
out of the initial two you have, are both pretty cool. In fact I actually have a TRD shirt that is a button down jersey styled shirt just like what I imagine you are describing with your second describtion.
Playing baseball for as long as I did, I actually miss wearing the 1/4 sleeve undershirts. It would be great to find a vendor that carries them, normally they are inexpensive and easy to print on.
Dave said he has a line on a silk screener already, and I know we have a silk screener that did some shirts for my son last year for his relay for life team that did a great job and turned the shirts around in three days.
Back to your baseball styled shirt idea. I think if you had your screen name on the breast and then your truck name on the back would work. I am also thinking of maybe having an off road type (heavy lugged) tire as a background image with the names printed over it.
Of coarse I am just conceptualizing right now, building off your base ideas.