Which one of the following I should buy if I want to build an overhead?

1. http://www.cockpitphd.com/diy/fscb/iocard0001.html
2. http://www.cockpitphd.com/diy/fscb/iocard0003.html
3. http://www.cockpitphd.com/diy/fscb/iocard0004.html

Thanks