Hey bob, finally got around to getting a picture of the door spacer on the 68 conv. This is off of my white 68 conv.
Thanks Mike! Now I see. This is the price I pay for never owning a convertible! I think I see dimples on the door pics above that might be there to show where to drill the holes. Odd that these never had them. So... while I have you here, any idea what these are? The bag said 68 Impala trunk:
and I found an interesting looking bolt in the mix. 1-1/2 inches x 3/8.
Maybe seat? Convertible top? Top of head is rounded unlike a normal bolt. Almost looks chrome but it's not.