Hey MK,
I am in Raleigh NC and just started in Legends this year and running at Wake County and South Side in Va. (Southern National while close is just a bit to unforgiving to a rookie like me.) I had many of the same questions you had and with the help of this forum and other racers I have learned quite a bit. If you are nearby you are welcome to stop by my garage and check out the car, equipment, and talk setups etc... I'd be glad tell you what I know. FYI, Southern National is cancelled this weekend and will not have Legends next weekend due to the INEX Regional at South Boston (worth going to if you have the chance).