That, right there, is precisely what I imagined a ‘75 and ‘09 F1 car would look like if you mix them up.
It’s just a tuned-mass damper, exhaust-blown double diffuser, air brake, and general nips-and-tucks away from perfection.
Engines? Well, whatever, really. Just cap it at 19,700 rpm and don’t choke fuel flow too much (but no refueling, still, so...), equip KERS of any sort and you’re all set.
OK, OK, I guess if there’s anything I’d like to change, it’s this back side. Like I said, exhaust-blown double diffuser, air brakes (maybe make the wing wider and longer) and no pylons (make the wing grow out of the diffuser). There. That’s all.