[Racer x]

This is the fun part. And when you bore the block the taper is small so its even harder. Let your fingernails grow. Of sharpen a wood dowl into a chisel shape. Oil everything up and find a way to hold the case steady. Wrap one piston with a rag and turn the crank till the other is piston is up. Now eat a biscuit with butter to steady your nerves( my watch maker instructor told me that once)

Set the rings gap at 2:00 and 10:00 and same the the oil rings. Put the oil ring spring at 3:00 6:00 and 7:00.
Now set the block on the piston push the ring so the gap is out and gently get the back of the ring in the block the carefully guide each end into the block. Rock the block gently down to the next one and repeat. Once you get one walk away and let your arms rest . The repeat on the other side. Don't get frustrated or tired. Pull the block off and try again later. It ain't easy.