Nothing in production except for the tunnel ram that I'm aware of (BTW, I have one of those of for sale). I've seen pictures of the SK part Ford 2x4 barrel intake and have a magazine article where it was tested. It made 40 HP more than the tunnel ram tested. The engine need stiffer valve springs and floated at 6600 RPM and may have made better power at higher RPM.
Dan Jones
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