I wonder if Dan will give you a 30 day warranty on the car...
I know Jeremiah thought his timing chain was bad so he bought the whole kit. Turned out his A/C compressor was coming loose and thats what was rattling. The chain will vibrate depending on what RPM you are at and what kind of tension is being put on it. You never know, maybe its just something kinda loose. That car wasnt in pristine condition and you arent gonna keep that KA in there for ever tho...