I have a set of original/used radiator core support cross braces for a 70-71 GS/GSX/Skylark. These are from a parts car I purchased (1971 GS 350) and are pitted but fit and function fine. The square nuts are still in tact and not broken off, but they are pitted. I can email pics if you are seriously interested, but if you are looking for a pristine/smooth set, please keep looking as these are pitted! $50 plus shipping from Texas. Post email address for pics.
James, I was wondering, are the bars pitted at all? Figured I might as well ask and get it out of the way.
Texted you pics. Need an email address or cell phone for sending pics. I can't post pics from my iPhone.