New to LS have a few questions

I just bought a 2002 LS V8 and have a few questions. First I'm trying to figure out what trim level I have, I need to replace the front lower ball joints and I'm not sure if I need the 14mm or the 16mm. The car has 5-spd SelectShift Auto & P235/50VR17 Tires on chrome rims does that make it a sport? I also need Stabilizer Sway Bar Links 1 front and 2 rear I saw all of these parts at Deutsche Parts USA which I found reading the forums. They also show Stabilizer Sway Bar Link Bushings would I need those too? Last question for now where is the sensor for the rain sensitive wipers mine are not working.
Thanks

Yes, if you have SST then it should be a sport. There should be no chrome on the bumper.
The rain sensor is on the windshield behind the rear view mirror.

Rain sensor: that should be right (passenger side) of the rear view mirror.