The US Government, through iits Recovery Finance Corporation fronted the money for production of the HJ as part of the 1949 re-capitalization package. The K-F V-8 engine project was, according to two lead engineers on the thing, "a blind alley" meaning the design concept would not work.
Check the 1949, 1950 & 1951 Annual Reports and the Society of Automotive Engineers (SAE) paper on the Nash/AMC V-8 in its UNABRIDGED form.