In the first paragraph: "the 21st-century Charger sales peak was in 1973." That should be 20th-century. A bit more than halfway down: "in 1975, they won 14 Grand National wins in the older cars." "won" and "wins" are redundant -- maybe change "wins" to "races". Toward the end, "There was no Coronet Charger for 1977". True, but there hadn't been one since the 1974 model year. Actually, there were no more Coronets for 1977; those models were renamed Monaco.
Sales were lower for 1975 because of the lingering recession, and the higher gas prices. Economy cars sold well, but sales of larger ones didn't improve until 1976. The Cordoba could have been considered an economy car compared to larger Chryslers, but the 1975 Charger was topped in price by only the Royal Monaco in the Dodge line-up. Moper reduced the Charger's base price about $1000 for 1976, though its standard engine (for only that year in this generation) was a slant 6; the SE price was a bit more than $100 lower.
The 1975-1978 Charger wasn't a bad car, but it was no longer a real Charger. The smogged engines weren't as powerful as a few years prior, the extra weight due to safety mandates also held it back, and it lacked similar aerodynamics at racing speeds (which wasn't a priority, given the national 55 mph speed limit). It was this design that prompted Richard Petty to quit Chrysler and start racing Pontiacs. Perhaps Dodge should have given it a different name to promote personal luxury rather than performance. Polara was available; maybe another Spanish name, to go along with Cordoba.