Correct Rear Bumper Stainless Bolts

[gwp4]

Hi First Gen Camaro Experts -

This should be an easy one.  How many stainless rear bumper bolts were there on a standard 68 Camaro base model coupe?  Also, does anyone know the size and GM part number?  I've attached a photo of the bolt on the rear bumper now.  I'm trying to get the correct bolts on there as the Concourse judges dinged me because they noted the stainless bolts were too large.   Many thanks.  gwp4

[KurtS]

Zero. Stainless was not used on the bumpers.
Almost positive a rivet like that was never serviced separately.