Valve Covers, Year?

[Offender]

While digging through my parts I came across these valve covers. I am not sure what year they are off of but if I recall correctly, I got them with a '68 383 Road Runner engine that I installed in my Belvedere. Not sure about that but don't recognize the filler on both sides being raised and a cap with a breather fitting on it. Anyone recognize these covers and know what year they are? Thanks in advance.......

 

[davek]

Valve-cover guru wanted

First, this is only curiosity. I don't want to sell them, I probably won't use them, they would all need hot tanking as a first step, and I don't think they are worth the expense. Two are being used as a masking device to paint cylinder heads the others are so filthy/rusty inside, they are...

www.forbbodiesonly.com

 

[Offender]

Valve-cover guru wanted

First, this is only curiosity. I don't want to sell them, I probably won't use them, they would all need hot tanking as a first step, and I don't think they are worth the expense. Two are being used as a masking device to paint cylinder heads the others are so filthy/rusty inside, they are...

www.forbbodiesonly.com

Thank you very much!