I went to the parts bin and reinstalled the summer/winter air box piece back on, with the traditional air filter cover (sitting on top of a Weber 32/36). The manual shows a second flexible hose going straight down from that box, presumably to the bottom area of the radiator, not really sure where that hose goes but it would suck up air in the 'winter' position. The top hose fits right into the air filter housing (I'm presuming). The manual says to keep the air box in the 'summer' position for temps above 50 degrees F. That's pretty much 365 days a year here in south Texas.
I like the idea of 'cold' air going into the carb, like the original design, although not really sure if it makes a huge difference Again, still don't know though where the bottom 'winter' hose goes to or if it just drops down to the bottom of the engine bay.
thanks in advance for any ideas/tips - dave