Welcome to the club Nick,
Maybe I missed it somewhere but do you know who made
your Cobra kit? ie Everett Morrison, ERA, Classic Roadsters, etc.
You might get more info on shortcuts, pitfalls, or things to be
aware of in the build if others knew which kit you were building.
There should be a data plate somewhere or if you have the build
manuals that would give you the info.
As feddersenr mentioned, now would be a good time to research the insurance
costs and availability before you get too far into it. Also any registration
issues, although I don't think WA is too bad about that. (Definately
not California!)
Now the fun begins - good luck!