Well no matter what you do to any car you have to be able to tune it and the biggest down fall of the Starion is the ECU. I am personally going with a Hurricane 2 injection system, but thats me. i am not trying to do it cheaply and throw it away per-say ( not that cheaper methods arent as good ) its just the way I want to do it. I wouldnt use the Caravan head, or rather I am not going to. the Marnal head is the best casting, you can get it bare for about $350. no biggie there. What sucks is trying to find an aggressive cam that will work with the factory hydraulic lifters. i am going to convert to mechanical, its not going to be my daily driver. other problems areas are the balance shaft adn timing chain tensioners... they arent a problem BUT mainaining them is the key. You have to change them every 70-100k miles or you are asking for trouble. I just caught mine in time.