Never. Never in a million Democrat years would they allow it. No one but the auto industry would profit. Thus it’s impossible. Well the owners of the car but no ancilaries like Govt.
A modern production line could rip out such a car for a fraction of the cost of a modern after the factory was set up because of robotics and modern metal tech. And it would still get good mileage at lower pollution rates than the originals because of weight and advances in our knowledge.
The truck I mentioned above a 97 F250 supercab with 4wd and an 8 foot box got under 10 mpg highway from the factory (about 7-8ish) and was a stonedog. It now gets over 15 highway easily/no trick driving and will burn the 37 in tires with no issue.
I built that same basic motor on another truck in 2000ish and it destroyed the stock pollution spec on a Vegas smog check with NO CATS or pollution controls. And I am no nascar engine whiz builder. Just used dog simple hot rod tech. and aftermarket performance parts.
Dyslexic typo...79 Ford
I should also add that said truck was running those 37s with stock 4.10 gearing which is far from optimal for the cam in that engine. I would bet going to 4.56 or 4.88s would increase mileage a couple points all around because in town it’s lugging the motor.
Again, just basic math and performance tech. The factory was most often shoving stupid gearing in the mid 70s vehicles to try eeking out the best milaage. The 410s in the 250 were OK stock but the F150s often had 3.54ish gears, I have seen Chevies with 3.07s on a TRUCK. AT 5000 pounds, thats insane and no wonder 5 mpg wasn’t uncommon with full time 4wd. The engines were constantly lugging even at highway speed.
Then add in the detuned/smogged crap that never worked right...
(((Never in a million Democrat years would they allow it. No one but the auto industry would profit.)))
The dark side of my brain also has a suspicion about a vehicle without electronic ignition not being susceptible to a stingray device or GPS tracking