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!!

View attachment 1715355487

One old dog to another, looks ok to me . Maybe the nut behind the wheel is ------ ------ - - - !