for the gap you could use the rubber pieces thaey give you with the bushwacker fender flares like this Bushwacker Part b/w000040-01 - Fender Gimps - 4 Wheel Parts
just a thought when you mentioned it
You can get single sided adhesive weather stripping at Home Depot, that's what I used on mine. The first time I only used 3 segments spaced out around 6" and the wind still found it's way through somehow.
