http://home.comcast.net/~mikelouie/autocross.html

Read that. Your first year will be a learning experience. Get as much seat time as you can. Ask for instructors to help you. They can ride along with you to give you pointers or drive the car and see what the limit of your car is. Most people drive their cars at 5/10ths or 12/10ths of their car. A seasoned driver will always be 9/10ths to 10/10ths the limit all the time.

You would be in SM with the engine swap and as long as you have the interior infront of the front seats.