you took the words from my mouth, almost!
i've been considering cold air intake for my own 33 recently, by means of a hard pipe entering the deep dark cavity just forward of offside wheel arch, through the inner wing.
I was thinking a 3" stainless swan neck to route the air up to the inlet, with a twin cone open air filter on the cold end of it.
Where the 3" pipe would pass through the inner wing, i was going to manufacture a four bolt plate that is welded as part of the pipework, so that it would reinstate the strength from the whole cutting, and secure everything very tidily.
then, open up the area in the front valance directly in front of the the filter, and duct some air straight at but pretty short of the inner cone entrance area.
i reckon this would be a great area to drag the air from, it is a ready made pocket, and is insulated completely from the heat of the engine bay.
the only hesitation i have, is that being so direct, almost out in the open, when the rain comes and youre in the spray of other traffic, i suspect there would be some damp intrusion.
i get this with a japanese car that i have modified with a blitz sus cone filter, and in the rain spray i get a stutter occasionaly, and i'm pretty sure its damp air managing to cross the maf sensor, having said that, the gain when its dry is well worth it, so i have no plan to change it any way, other than somehow diffusing heaviest of the damp air away if i can suss it out.
is that anything along the lines of your thoughts Al?