the timing belt and water pump and the rest are good things to do when you do the serpentine belt. That is why the tensioner comes with the kit. I did all of mine together as I have seen the tendency that everything wears together. When you start replacing one piece at a time they do not run true new and worn together. as a matter of fact this kit
http://cgi.ebay.com/ebaymotors/Timin...Q5fAccessories
comes with both belts like mine did. But since OP wanted gatorback I posted a kit minus serpentine (accesory belt) prevously