Picking a 216 as your first effort at engine rebuilding is a pretty ambitious project. I hope you have saved the shims between the connecting rods and the caps, and you remember exactly how many there are and where they were placed. That's how the oil clearance is adjusted, as the bearing material is bonded into the rods and caps. The engine won't survive more than a few minutes if you don't get the rod clearance right on reassembly.

Have you measured the diameter of the cylinders to get the right ring size, and also the taper of the cylinders from the top to bottom of the ring travel? A re-ring job might not be possible if the cylinders are badly worn.

I'm going to suggest that you find someone with enough knowledge to make those measurements, and the tools to do it accurately, before you proceed any further. You might be wasting a lot of time and money. The way you're doing it now is a recipie for disaster.
Jerry

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