BlueFalcon

Im looking to to do a 240z or 280z build. The car will be used for auto crossing but want to keep it street legal. Im new to the Z scene and wanna know what are some good brands for when i purchase parts for the car I want to put a mustang drivetrain into it (motor, tranny, rear end) will that fit? What i should look for when I'm checking out a rolling chassis as far as rust, rot, etc