I already laid out the rationale for ducting to be not as good a solution as lowering the lid.
You don't like/agree with it, go build it, or find data from someone who did, or present some sort of supporting evidence for me being wrong and/or you being right, or even just find something that has been ducted for the purpose of improving aero.
BTW Tempos are freeking awesome; I'm glad they aren't "popular" cuz that means more for me for cheap! One of my '84s has nearly 300,000 miles on it so it can't be that awful.
