Can you identify these pistons?

I got these pistons but I am not sure what they are for. I can't find much online
The box says they are 0.030" oversize and I measured them at 3.910"
Based on what I saw online, that would be the standard size for an LA 318 but I haven't found anything that would have been 0.030" smaller than that stock size
Also, the small dish plus the weird valve placement makes me think they might be for a poly engine? I am not sure on that...
What do you think?

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Can you identify these pistons?
Author: admin