I have a 2000 gtx....i wanna buy a spare supercharger to pollish and was wondering if all the m90's on the 97-03 are the same. For instance will a supercharger off a 98 match up to my LIM? Also i eventually want to get a cam and someone informed me that if i do, the engine will only last 20,000 miles and Ill be eating up timing chains. Is that true? Thanks guys