Beer bet about 69 grilles

for what it's worth....
i have a 69 original 383 4sp fastback "S" cuda and it has black plastic center grills with the common chrome surround. there's a pic of it here on FABO under 1969 Cuda 383 Formula S and 68 340 My Cuda's link.

i could probably take a drill and bore a hole through one of the grills just to check the consistency of the plastic .... but i'd rather not.
just saying....