... but it's going to be somewhere north of 3500 rpm (?) at 70+mph unless it also has jumbo tires.
I remember my Wagoneer with 3.73's and stock tires sounded real busy on the freeway. Its short-stroke 304 V8 - essentially a SBC - didn't seem to mind.
Adding current-spec airbags, designing crush space in front and side-impact door stiffeners etc to meet current passenger car specs seems unrealistic.
I like the idea of starting with a farm jeep chassis and setting this on it. I doubt a company could build several. There was a similar case involving Land Rovers that got shut down.