i was told that a m90 s/c install on a 98 3.8 is fairly simple to do and parts arent to hard to get. i was told to go to standardautowreckers.com and i could get the parts from there no problem..only thing is i dont know what i need. i was gonna go with split port swap but then i was told at the last meet i went to (which was last night lol) that a m90 what give me more hp and was easier to do and get. if anyone can help me on this it would be much appreciated thanks.