first of all... your question is a bit broard to say the least.. and to answer your question
Q: "is there any good or bad reasons for an automatic set up if you are Going to road course or Auto course the car"
A: Sure.. lots!
any choice when building a car is bound to be a compromise... and if you install a well built automatic with a paddleshifter and a well engineered converter its not a bad choice for a car that see the track from time to time...
but it will rob more power than a straight cut manual tranny.. and the weight of the converter will hurt your acceleration out of the slow corners becaose of the bigger polar moment of inertia..
on the other hand, a straight cut, manual tranny will suck in daily driving..
and remember, "there are no stupid questions, only inquisitive idiots"
(im only kidding) but seriously, do a search and read alittle before posting questions, noone here will mind spending half an hour helping you, bit it will have to be with a question you need answered because you are about to buy somthing or cut up your car, not just questions like "whats better turbos or blowers" or chevy vs ford
wellcome btw