Are the '65-'66 shackles detailed differently than those on the later cars? The reason I ask is that I thought the shackle bolt was dark/hardened steel appearance but I have photos of a top quality restored car where these bolts are silver (appear to be zinc or cadmium).
And I might as well also ask - in all cases the shackle plates would be bare/oiled metal and the nuts would be cadmium?