Have a line on a block to pick up as a spare. Not too many details yet, trying to get a date code so I know more. But it is a 12555506 block and has this “GEP / AMG” sticker on the valve cover. Need to check date code and whether it has the “triangles” in the valley. Should I be hopeful that I’m going to find them? I know the 506 blocks spanned the end of GM production (which had issues) into the AMG blocks (which are great).
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