Something about the powerplant seems to be the sticking point in the minds of Marque Loyalists. Probably why we never saw RX7 Scarabs(Billy I can feel you googling that as I type:)) and what not. Funny though. You can change every other thing from tranny to suspension but the motor is somehow sacred.
Still the Mazda 6 might have been the way to go. Wonder what the actual weight difference is?
I remember back in the 80's the Porsche guys were borrowing crosses from the Klan and looking for the guy who Dropped a Rat into a 911 chassis. Lucas Kinsler injection and all.