Andrew,
ok i'll try and remember without looking at it can take a pic if you need.
i have got a 90 degree rubber pipe just the elbow 2" i think it jams into the hole beside radiator.
get some 2: exhaust pipe or 2.5 whatever i used and fool about 1 " long piece so you can clamp the flexy hose to it, i also braised a fitting in the front one to run pcv/breather.
more flexy hose at front of 90 bend under nosecone. filter is mounted in middle of nosecone, i got a small filter from repco $29 and a 2" to whatever size adaptor to suit the pipe and filter. then some angle brackets that hook onto the filter adaptor.
watch what size filter you get as it wont fit through the gap.
as for water, i have driven in rain then pulled the hose off at tb and its dry, even if it gets wet will only make the air a bit cooler