I would run straight to Reliable in Richardson off of Beltline and 75. Talk to Brian Prosser, he is good and straightforward and he is not bothered by someone asking a bunch of questions when they are buying a 35Kish car they have never seen...
If he still talks to me daily he will surely be fine with you "bothering" him.
I have worn him out.
Tell him Chad referred you. I can get you his number if you want it.