W5 heads

ValiantS said

This is what I remember. I think it was Weslake? that did some portion of that.

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"Mullen & Co.", lol, Bob Mullen. Flowing at 3"H2O is a low hurdle, not to mention at only one depression, & one direction. Mopar tagged SB heads "W", & B/RB stuff "Stage", the B/RB W2 'copy' flopped....I would love to see a modern testing & analysis on them if they still exist.
Edit: AFAIK those heads never recieved any designation, the ports were oval but low, & they were working with stk. 2.08" valves as a starting point.