I agree with everything you said. At first I thought LS7, but you're right, to differenciate they should definitely beat Ford to the Twin Turbo V6 muscle (sports) car. It'll needs to be a VERY good engine, though.
@Maxx Cracker — sponsored by Peniston Oils: Press release... read it. If lazy Ray would give more details in his post besides a negative title, people would see that this will be a very good offering for this segment.
Probably not as forgotten as that Isuzu engine, but how about those LT5's from the middle years of the C4 Vettes. Lotus design, American application... great engine in its day.