For anyone looking to replace a headlamp switch in their 70-72 GS, make sure you know that its a very common part available from all over for $20 or less. Original Parts and others are happy to sell you one for more than $50 though.
https://www.rockauto.com/en/catalog...lectrical-switch+&+relay,headlamp+switch,4472 https://www.rockauto.com/en/moreinf...41zHs/xGkIL7P6gyHEvXM5fXYhvS5b0oiECRusOr3zgWl
Yep, Amazon is about the same price as Rockauto and free/fast shipping with prime! Same switch was used in vehicles from the 60s to the 80s. I was just trying to save someone from buying an overpriced switch from a reproduction parts house when you can literally get these from Amazon Autozone or Napa.