If you are thinking a 426 hemi dart or a 3rd gen hemi with twin turbos and can't afford a Kmember I'd say you need to spend a little more thinking the project through as a whole. For instance, the aftermarket K, while it will add some money to the project is a drop in the bucket, plus it will save you time and money and open up some options for you later when getting into headers and exhaust for either combo.
