Phil,

If everything looks ok, and you are not going to pull the head, you can roll the new chain in from the top. I can't remember on the 220 if part of the oil pan bolts may be covered by any ancillary equipment on the front of the engine, but I think you should be fine without having to remove anything. Just clear room enough at the front so you can get a breaker bar and socket on the crank bolt to turn the engine over with.

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Regards,
Aaron