Thanks-I was able to verify the 560 rings are plated by cutting some used ones. I would think they would work in a iron block. According to the info you kindly provided it seems the only difference is the 560 middle ring is chrome instead of moly. From what I have read cylinder preparation is critical for chrome rings to properly seat. Since the engine will be bored the cylinders will be new and there should be no issues. I'm going to try and get the block in for sonic testing next week.
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Originally Posted by 1960mog
X2 on the wall thickness of the cylinders.
It may be worth to cut open a old block to see how much meat is actually there.
All piston rings for aluminum blocks are chromed.
All oil rings for cast iron V8 blocks are also chromed.
All upper compression rings for US 450s are chromed.
Upper rings on 450s for other markets are molybdenum coated.
The second compression ring on all 450s is molybdenum coated.
Does this mean that one should be able to run a set of chromed 560 rings in a cast iron cylinder?
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