Nice to see you just going and going with this wild dream. The " The RB26 is more reliable above 800whp than any VG motor " claim I'm not so sure about. Reason I say that is, the motor still holds the Salt flats record of 260mph. The motors are knocking on the 6 second barrier. I think response is what your going to get out of an in line 6 over a V6 and it only makes sense from a turbo charged motor. The Z would be no different than the Supra of today with it's well known dominance if it had come stock with the inline. What about availability of parts when or if something breaks? I guess Japan will ship those to. I think whatever you do with it. The power levels your looking to get is going to need a lot more rubber on the ground, lol. Is a half back cheaper than a widebody?