I happen to own a ’70 Chrysler 300/Hurst – but currently it looks no where as good as the one in your photo (yet).
Chrysler and Hurst did several projects together – but only one with the Hurst colors and name.
My understanding was the cars came from Chrysler assembly plant incomplete, Hurst painted the cars, modified the hood and trunk areas, then sent car back to Chrysler to add the finishing touches.
The hood and trunk lid are mostly fiberglass, it has a fiberglass spoiler/wing (hard to see, but it is there). No trunk lock cylinder (which is unusual for a car made in 1970). They only way to get into trunk is via button in glove box or a handle by the seat.
The trunk is big enough to stack adults either width-wise or length-wise and pilled a few bodies deep (if a person was into that kind of thing).
My 300 has a center console – which is the same that ’66-70 B-body’s use, except for a cushion on console lid and a cigar lighter made into the rear chrome piece (for rear seat occupants).
My car also has automatic A/C (not the semi-automatic A/C that a lot of M and J-bodies have). It also has a second foot petal button on floor, close to the high beam switch, to change radio stations (which can be confusing when changing beams and you press on wrong button).
It is rumored that Hurst modified the A727 in the car – but that hasn’t been confirmed, yet.
The odd thing is it uses a 100% Chrysler floor shifter system.
My 300 does jump sideways about a foot on the 1-2 shift and leaves about a foot-long scratch on road, on the 2-3 shift – so not sure if out of place for a stock U-code 440 TNT / A727 w/3.23’s, or not.
I also heard this project failed. Hurst was thinking that Chrysler was going to promote the cars and Chrysler thought Hurst was going to promote the cars. Neither company did, and thereby not many knew about the cars were even made.
Hurst is the one Chrysler used to modify the ’68 Dart and Barracuda’s and turn both into Hemi racers, which was the only other “known” performance project.
Hurst was also used with a few taxi programs (lowering the floorboards on cars) and other minor projects.
Note: the black 3-piece grill (has electric headlight doors) is made from metal, and I think it is cast iron, maybe. I do know it is heavy.
Other than the powertrain, not many other parts interchange between the C-body and Y-body cars.
BudW
I have no idea what sort of car this is - as my Pop has this long before I was even a twinkle.. My mother says it is a Chrysler - which makes sense because that’s all my pop ever drove.. 
