ok there is no help for me. here it is. my 70z came with the tall 3 piece spoiler it has numbers on the end caps 3990475 3990476 with a diamond embossed on the bottom top inside of the diamond it says pos on the bottom inside it has 1, the car is a LT1 Z. it is a kan. car built 06B which is june second week the holes in the quarters are huge well were i put a short spoiler on it, i was told it was a copo car. is this can this be true. i am aware of the history of the 701/2 copo's but dont have build sheet. long gone. what are the numbers on the copo spoiler or a non spoiler. any help will greatly be appreciated. thanks fellas:screwup:

I am not 100% but those numbers look familiar, i think those are on my 73 z

I HERD THAT PHIL CAN HELP WITH THE 70 COPO QUESTIONS. ANYONE KNOW HIM. THANKS IN ADVANCE:bowtie:

According to my GM camaro catalog from '72 PN's 3990475 & 3990476 are the end caps for the three piece spoiler good for 70-72....I don't know if that helps you or hurts you. It at least points to it not being a 70 only PN