[blykins]

Trust me, your three "reasons" weren't explanations for anything.

1. That's your opinion.
2. Lame excuse, if you really want to make it look like something it's not, put an FE in it. A stinkin 352 would look closer to the original than a Windsor with those big valve covers hanging off each end. If you spend all your time trying to make your Cobra "play the part", then it will be a never-ending journey. If you were proud enough to put a Windsor in your car, then be proud of it. If you like pentroof valve covers, which is understandable, there are plenty of them out there that fit Windsor heads.
3. There's only one that I know of: JBL. Do you have a JBL?