For a drag car, I'm convinced the 2.1L is the way to go. Marco doesn't seem to think so after testing a few though. For a street/strip car like mine, the 2.4 can't be beat. If I ever get the time and money, I do have another DSM engine idea, but that's another thread altogether.
I wish Dart would make some thick-walled blocks like they do for Honduhs, than the possibilities would be endless.