I tried putting a Holley 800 spreadbore on with mixed results. The WOT is running very lean. I pulled the 94 jets and installed 99's and it only helped a little. The power valve is one of those power valve eliminators. I don't recall if that allows free flow at all vacuums, or if it restricts the flow? If it allows free flow, why is it still way lean with 99 jets?