69 Camaro Four bumper bolts

[Lynn]

I realize there could be several different manufacturers of bolts and therefore different head markings, so not really concerned about that. I have found multiple instances of different manuafacturers bolts used interchangeably.

However, I doubt that bolts with different size captured washers were used unterchangeably.

The smaller washer on these 3/8 bolts is 3/4 inch. The larger is 1 inch.

Which is correct for the outer bumber brackets? Talking about the four bolts that fasten the outer bumper bracket to the lower fender extension on a 69 Camaro.

I looked in the AIM and can't even find the page were the bumber gets bolted on.