Curious on details on the stock valve covers that come stamped with ''Oldsbile'' on them. Are these a special option that Oldsmobile offered or is this a sertion year, make, or model thing? Reason I ask, I due my old man was at the wrecking yard and pulled some valve covrrs for me state now my rocket can be a rocket blah blah. I told it already is lol its a 68 block on thing that did spark my interest is the fact the valve covers were olds gold, but they came off a 77 model my old man said