97s were supposedly not able to handle the added stress of larger than stock 17" wheels. A long time ago there was a forum member named Grizz who ran 19s on his 97 Box and he said in his sig that he was "cheating death" by doing so. Not sure what happened to him. He worked for the Secret Service or the MD State Patrol. Hope he didn't have a job related accident or one of his wheels fell off.
He always had great stories.
Meat Head - those wheels look great on your Box. I had a set on my previous CS. Simple but stylish look. And very easy to clean. I like that in a wheel.