Torsion-bar suspensions, Torqueflite transmissions, and electronics, for starters.
ChryslerSolid-state electronics were getting sufficiently cheap and reliable by the middle 1970s that Detroit began installing electronic ignitions in even the more affordable cars they built. Chrysler Corporation was putting such systems in its American-built vehicles for 1973, and this magazine advertisement tacks on another batch of somewhat less innovative engineering feats to that brag.
Chrysler
Chrysler had been using unibody construction torsion-bar front suspensions for many years by 1973, though including an automatic transmission as standard equipment on all full-size cars was a plus for Fury and Monaco buyers who had been paying extra to escape three-on-the-tree manuals.
Keyword: Chrysler Offers 7 Engineering Differences for 1973