Forgot one more thing, anyone know the part numbers for 1968 Z/28 valve covers or where I might find the info? Also, has anyone heard of R&S Chevrolet based in New York, my car was purchased there in November of 1968, I have the original paper that lists when the car was purchased, but I do not have a POP, a build sheet, or a window sticker, and I would like to track this place down. If anyone knows anything about that dealership, like if it has changed names, or anything please let me know. I can't rememberr right now what town it was in, but I will look on my paper and list that shortly. Thanks.

3923226, same for both sides according to GM parts manual.

Careful with NOS-Chevy substituted chromed '69 covers under the same part number for some time. If you find a set make sure they do not have provision for an oil fill cap.

Theres a set on ebay right now. There going to be expensive. Very Rare. Look up 68 Z28 Valve Cover and you'll find them.