Correct Spark plugs for NCRS 67 Corcette 427/390

[HPMIKE]

I am currently in the process of prepping a vette for NCRS and have a question regarding spark plugs.

What is considered to be the "assembly line" plug for this car(67 Coupe 427/390 with powerglide and California emissions.?? Look at the attachment. These plugs were told to be right but I am not 100%. Hopefully someone can shed some light on this so I can put this to bed. The plugs that are in there now are positively incorrect. I am admittedly not a Corvette detail expert, but i am trying my best. Luckily for me the car is absolutely phenomenal and I don't have too many hurdles to overcome.

Thanks in advance for any help offered.

MB