From the same place that the current Chevy Impala and the Ford Fusion get their rear wheel drive parts.
I have never seen a Rear Wheel Drive Ford Fusion in my life?
If we want cars based on more "realism", (which I wouldn't mind to some point) we should have a '70's Chevy Impala.
Slightly different subject, I've been laughing at the Ford n Chevy NHRA Funny Cars, with their "Hemis", (and I'm a GM fan!)
Do we want realism?
All we'd see right now, is a LOT of Dodge Chargers in NA$CAR, NHRA !
I'm not a Toy fan, but if we're gonna make them build a mass produced push rod V-8, why not make GM n Ford build a mass produced real wheel drive Impala n Fusion?
Actually, I'd like to see another '69 Chevy Malibu $$ / Pontiac GTO, with a current Vette drivetrain !
Or a '66 Fairlaine / Mercury Comet Cyclone GT with a "Stang 'Train?