Keep them on the same side they came off. Remove the rivets and coat all three layers with copper coat gasket spray. We did it on our engines because it was ours and never had an issue in the past. I have seen them used up to three times by racers at the track . Never reuse them if the block or head is o-ringed with inconel or copper wire. The wire tends to cut or weaken the compression ring in the gasket.
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