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Though we were reusing the pistons, Jeff Johnson at JMS told us to always replace the rings, no matter what. Here, Johnson is cleaning carbon buildup out of the ring lands with one of the old rings. New rings in place, he prepares to reinstall the pistons. We know you've heard it a million times before, but be sure to use plenty of assembly lube and protect the crankshaft journals by putting sleeves or vacuum hose over the rod bolts.