Very interesting indeed. But how about if all you want is a street machine with some solid performance and a better mileage? What if you don't plan on taking it to the strip? Was the 518 acceptable?
Starting to get the impression that none of these options are inexpensive? There are some installs that are less expensive than others, but nothing like going to a junkyard and grabbing a used unit and just slapping it in. Not for us unfortunately.