[68 COPO II]

I am looking for a correct set of T-3's for a 1968 COPO nova which I have entered for a Gold Spinner at the upcoming Chevy VetteFest. Last weekend, I hit the Long Beach High Performance swap meet and found 1 headlight with no lines inside the T-3 triangle. I have two already which have vertical lines in the triangle and the dates of H 3 7. I plan to hit the Pomona Swap meet this weekend and continue my search.
Can anyone tell me which is correct? Vertical Lines or No lines? Also, are the dates codes diiferent for 1968? I found a B 8 date also?
Or Will the judges even look at the headlight details?
Thanks for your help !!!!