MP Super Commando Heads

Hi All
I have come across a set of MP Super Commando heads, part number P5153850. I have google and search FABO and have found very little information on these.

These heads have 2.08 inlet valves and they use off set rocker, .350 I think, some info mentioned a inlet manifold that is only suited for these heads, is this correct?

Can anyone shed some light on these?

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