Direct Connection Valve Covers

I don’t remember much about the Stage IV specs. They were a good head. If memory serves, they were the best stock head treated to bigger and better valves and valve job. I do not remember what they flowed. I don’t think DC did that back then or at least for the public.

Then they went on to Stage V, VI & VII heads.
Stage V also being cast iron heads.
Stage VI being the first aluminum heads offered.
Stage VII being basically Edelbrock Victor castings.
I don’t know if MP dictated any changes to the Edelbrock head for improvement.