Chevy..HONESTLY
What your looking at is a full size ford motor from 1985. Presume something like a Lincoln continental.
The casting number on the intake gives away the coding.
E5= E, 5th decade 1980. 5, 5th year. = 1985
A= Full size Ford.
E=Component from sect E ie Engine.
9425=manifold
B=Engineering version.
hence intake code now decoded. My guess is its a 302 family 2v low compression emissin engine. Its not a clevland engine as the rocker covers are completly different.