Willie, there is no specific wording that says a fender is not considered part of the streamlining, but maybe I've got a note or an email from one of the M/C tech people saying so. And whether or not I have that in print -- I know I've been approved in a naked bike class with a front fender -- repeatedly. Sorry I can't find a specific paragraph, although you might note that fenders are described in their own paragraph (7.F.4), and not mentioned in the paragraph on streamlining. Ask Tom Evans or Van Butler for a written response so you'll have it in print -- and if I'm wrong -- let me know so I can remove the fender before I go to Bville in a couple of weeks. but -- I'm pretty danged sure I am correct. About the damper - I get confused when I don't have the rulebook in front of me. At ECTA a damper is required if a bike is running in a class with a record of 125 or above. At SCTA you're right -- ALL bikes must have a steering damper, even production bikes that don't come stock with one.
As for you, Racer X -- from what I see, either of those fenders would be okay - as long as they cover less than 181 degrees of the front wheel. I've seen 'em cover all the way front-to-back, and also just the front half and part of the back. Make sure the bottom edge is above the centerline of the axle and you're okay.