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The heads are in exactly the condition they came off my car at 60K miles. They were not showing any signs of stress. I did a compression test shortly before the engine was taken down and all cylinders were showing 190-200psi. The engine was basically stock, with bolt-ons at that point, and was in perfect condition. I only tore it down to built the 381 stroker.
I haven't looked at them, or disassembled them since they came off the car. If you buy them, and find any defects after they are tanked and checked, I'll give you your money back.
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