This meant the discontinuation of the Ambassador line in Mexico as the new operation had several priorities above offering a top-end luxury full-size car line. Aside from offering the already existing Jeep line, Willys Mexicana focused efforts on the compact Rambler American, which obtained a generation change just the next year, meaning a complete retooling of the Vallejo plant. In 1962, legal and industrial requirements in the country became stronger with the auto industry integration decree issued by president Adolfo López Mateos in 1962. Among its mandates, it fully banned the importation of automobile engines. Willys Mexicana began building its own engine plant, which was achieved in November 1964. Once the Rambler American was consolidated in the Mexican market, Willys Mexicana opted to expand the product line by introducing the brand-new second-generation Rambler Classic midsize model as a larger luxury counterpart to the economy compact American. Also in 1963, due to problems with WM's parent company (the SOMEX bank) as well as further requirements of the government auto industry decree, Willys Mexicana was reorganized into an entirely new company with expanded capital and direct investment from the Mexican government, Kaiser Willys, and American Motors. This resulted in the formation of Vehiculos Automotores Mexicanos (VAM).