CM871 vs CM2250 bottom end

[Liquidforce]

Thanks Signature 620, I assume no great issue in re-using the 871 air pump, but obviously fuel pump would pose an issue, no-one by chance happens to have both pumps sitting around.

I see a number of wreckers advertise the blocks as non- egr, or egr onwards, I wonder if it's mis-information on there behalf or it's workable.

Do the 871 have the external mounts but just not drilled/tapped? I can't imagine cummins would have retooled the block extensively to go to common rail.