[Excaliber]

Point well taken Bruce. I recall reading a "Hot Rod" magazine article years ago were they tested an engine with and the same engine without a valley pan. They (and myself) were astonished to see WITH the pan there was a measurable increase in horse power. I can't recall but I suspect it was the cooler intake manifold.

By the way, the high riser intake on my engine does not have a "heat cross over", as the high riser heads don't have the ports for it. Medium riser and others do. I'm in a warm climate so it has zero impact on "driveability" issues for me.