The Street Machine Summer Nationals is a huge Classic, Muscle Car, and Hot Rod event in St. Paul, Minnesota where a reported 7000 cars and thousands of gear heads get together for some high horsepower fun in the sun.   There is cruising, dyno runs, an autocross, vendors, and just about anything a car enthusiast could want.    We spent some time checking out some of the cars and meeting the people that make this such a fun event.