Is this nut on backwards?

Just acquired this sweet 74 Dart Sport and she needs a manifold gasket. Seems I also have a broke stud on the manifold closest to the firewall. 2 questions to start...

1 - is the nut pictured on backwards?
2 - can you buy the brass washer? (im missing one)
Thanks guys. And great to be back on the A Body Forum!!

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Those magical little drawers at Ace Hardware have just about everything. And just about any kind of composite of metal. Any new parts you can put back on it will be a plus...