Here's a bit longer explanation as to why you see many more GM and Fords bagged rather than post-1957 Chrysler products. In two words, "coil springs". It's very easy to replace the coils with air bags. Same suspension mounts and same vehicle frame interfaces for the load-bearing areas. Shock absorbers are not usually in the middle of the coil springs, either, although many are.
Pre-57 Chrysler cars had coil springs on the front, From 1972 and afterward, the pickup trucks had coil springs on the front. A '56 Dodge Sierra wagon went through B-J's auction. A customer bought it. It had a '90s Dakota front crossmember grafted onto the '56 Dodge frame rails, suspension and all. Everything was mentioned in the car's write-up in the B-J auction's listing, which turned out to be very useful. Where the coil springs would have been placed on the lower control arm, there was a cross-brace tacked on for the air bag lower support/mount. Not that hard to do, but to undo it (as the customer desired), it took some used lower control arms and a set of Dakota front coil springs from NAPA to get it unbagged.
The rear suspension was some unusual link affair, without bags.
I recall a thread on a guy in the midwest who had a black '66 Newport 2-dr hardtop that he had bagged the rear. I don't recall what he did with the front, but the car was level and low. As it turned out, he built some long arms to go from the front leaf spring mounting eyes to the rear axle. Turned out pretty neat, but was something akin to a "link-style" drag racing rear suspension.
I don't recall what he did with the front, BUT that would have been where the bulk of his engineering would have been. Why? The torsion bars front mount is at the lower control arm inner pivot. With the rear mount being rear of the transmission. Therefore, NO place to mount the upper air bag bracket. The only item which extends upward from the lower control arm is the shock absorber. In a metal tube that's about 1.50" in diameter.
In more recent times, the super-touring operatives have a front k-frame/coil-over front suspension unit for the E-body cars. Perhaps something of that nature might be grafted into the existing C-body front structure? Reliabily? Only issue with the air bags is where to mount the shocks to the suspension/structure, due to the nature of "coil-over shocks".
The "Aire" in "Torsion-Aire Ride" had nothing to do with air suspension, but the possible sensation of "gliding through the air", smooth and level, which the Chrysler Torsion Bar/Leaf Spring suspension could provide, along with a very high level of vehicle cornering and stopping performance when compared to anything that any GM or Ford brand could provide in the later 1950s . . . period. Which made that Chrysler suspension system one of the best every built . . . period. Which were aided by some of the patented engineering tweaks that Chrysler made to the system's design, by observation.
Many in here have experienced and come to love the way that torsion bar Chryslers ride and handle, which can make many in here wonder why anybody might desire to change it for something different. Especially when to do so would remove one of the main features of the vehicles!
The OTHER thing is that a C-body Chrysler had a somewhat longer rear overhang than other cars tend to. Even with stock ride height, they would drag the rear bumper on steep driveway approaches, by observation. Which required a bit of different vehicle approach angles to keep from dragging the factory dual exhaust pipes or the rear bumper. Been there, done that. A lowered ride height only makes things worse.
You might like the styling of the Chryslers and such, but those who know the cars and have lived with them since new, know that they are at their best on the open road. Even open roads with undulating surfaces and turns! Some HD shocks with the factory a/c suspension and some good tires and I soon discovered that turns where GMs and Fords need to slow down for, I could drive on through in our '66 Newport as if it was a straight section of road. THAT was fun and increased my confidence level in what the car could do . . . which made me glad I was driving a Chrysler.
So doing away with all of the great engineering that helped make Chrysler products the great vehicles they are seems like a total waste of resources. And "a shame", to me.
For that thread on the '66 Newport 2-dr hardtop I mentioned, I suspect it might be on the old C-Body Drydock forum. Drydock was still acccessible last time I looked, so that might be another place to look.
Thanks for your time,
CBODY67