I have ~’73 to ‘79 Small block development correspondence between Tom Hoover and paid consultants “experimental work”.
For small block heads, it mostly X head, street T/A, race T/A, W-2/2.5/3. There is a 360 head in there in ‘75 or ‘76.
I believe the effort/development was focused on what classes Chrysler (Hoover) wanted to focus on.
894 is an X-head BTW. Note tested by Mullen in late 1970. Attached for reference.
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