Thanks everyone! I joined the Riviera Owners Association a few weeks ago, which has been great! I'll take a look there to see what I can find.
I'm tearing in the front suspension this weekend and will be able to take a closer look. During my initial cleaning, the amount of rust flakes that were coming off was a bit concerning. Sometimes the engineering/scientist in me comes out and start thinking about age, creep, fatigue life, etc. and you just start wondering.
The good thing is, like TELRIV mentioned, the hood is almost laser straight (see image), so its always nice to have others come to the same conclusion that the control arms are most likely ok.
I'll keep you all posted!
-Scott