340 with metal in oil pan

jason's duster said
This is the cylinder that has the piston in upside down. No loose springs etc.

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View attachment 1715461181

Let's get pictures of all of the cylinders and the whole head(s) so we can see what is going on... Otherwise we may miss something...

also get a picture of both heads with the rocker arms removed... The whole head and then some close ups of areas that look different...