From jahawk's post I get the impression damage is mostly on the deck surface. It's a judgement call, but if the damage is small, welding or brazing may be a less invasive procedure over sleeving, assuming the metal can be properly blended to the remaining surface.

I'm not familiar with brazing cast iron, but cast iron blocks are typically weld-repaired with nickel filler material.

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95 E320 Cabriolet, 169K