Originally Posted by BOBCRMAN@aol.com
Doubt if Ford guy can tell. It's a small block chevy. Pistons look like cast replacement from here. As mentioned, check for brand/no. on inside of skirt.
They dont look like cast rebuilder pistons to me. They have a knotch on the one side and the ring looking thing in the middle. Is this an old build they look like old style after market pistons.
With the marks and the thing in the center of the piston. I would not run them unless they were my last choice. They look like they will cause hot spots and preignition. Are they drilled for expansion. Might be for extreame heat.
But without the exact part number there is no way to tell if they are good or bad. So anything answer will be a WAG on my part.