327 Emblem for 1968 Camaro Fender

[gwp4]

Hi Camaro drivers:

I have a 1968 Camaro and need to attach the 327 fender emblems.  I understand that the factory used "PAL" nuts to fix the stud on the emblem to the back of the fender.  I need to get the correct size pal nut and hope that someone might know the stud size on the emblem.  Finally, did the factory use zinc-coated stainless pal nuts rather than dark phosphated ones?   

Many thanks in advance.  gwp4

[bertfam]

P/N 9419753. 1/8" x 5/16"

AMK sells them as well as most other vendors.

Ed