Marine BB motors also came with these valve covers 68-69 although with no wire tab provision, so drivers side used on both sides of engine.
I remember growing up when guys were ordering these for their engines
You could even order them over the counter for marine in 70-71 style, with the two different style valve covers but again no wire tabs.
I have a 440-6 engine that I have a pair of the 71 style valve covers on and they look cool.
I still have these ones from years back.
Note the disclaimer....as if