I spotted the Chrysler on Mass. Ave., halfway between Harvard & Central Squares. These were last generation of true American hardtops---pillarless 4-door sedans. Getting rid of that B pillar required some engineering so the car wouldn't get the bends. Compare to the '66 Chrysler we posted from Harvard Square last winter.
I wonder if this '75 is the same car featured in a Curbside Classic post.