Generation 1 (1968-1972) T60/T70 series
The Corona Mark II, was designed as a model line that was between the top model Crown and the Corona. Basically it's a slightly higher spec than a Corona, with many of the same features of the larger Crown. The four door sedan was designated as the T60 and the 2 door coupé the T70. In 1970 there were minor cosmetic changes in the front grille. The 1600cc 7R series engine was replaced by the 1700cc 6R series engine. A year later the 1500cc 2R models were replace by the 1600cc 12R engines.
US exported version for the same model year, often include the more powerful R series motors compared to other regions. While Japan and other markets often had 1.5L 2R (1500cc), 1.6L 7R/12R (1600cc) to 1.7L 6R (1700cc) models as well.
RT62 sedans and RT72 coupé features the 1.8L 8R (1900cc).RT63 sedan, RT73 coupé, RT78/RT79 station wagons feature 2L 18R (2000cc)