Thanks, I had read that about them on here, it is almost legend.
But these look great, so far. I have them soaking in solvent ( I hate dirty parts) and will get them apart soon. All the valves both intake, and exhaust look the same consistent colors. The spark plugs were spotless, so far no obvious signs of any problems. But I am still pulling slugs, so there is a long way to go. Thankfully, I love this part of the hobby!