What gauges can I install in my 89 Camaro RS
 

I have an 89 RS with a 5.7L TBI truck motor. Of course I'm aware that with enough work, I could install just about any gauge I wanted to, but I want to know what my car is equipped for that I would only have to hook up the gauge and call it good? Would it only be the 5 gauges that are on my dash or could I also throw on trans temp and air/fuel ratio gauges as well? And if it's possible to add those, what would I need to hook them up to? Would I also be able to add gauges that I already have and wire them in parallel so that I have 2 functioning gauges that show the same thing? Also, if someone could direct me to a tutorial on how to install a fuel gauge (because mine is pointing straight up so that's the first gauge I'd like to add) that would be much appreciated.