CM871 vs CM2250 bottom end

[Liquidforce]

Thanks Mr Hag, perhaps I should have worded it slightly differently, if someone took a 2250 in frame kit, could it be installed in an 870/1 block, reusing the crank and block only? Then re-using all the 2250 ancillary parts installed on it. As we discussed via PM I'm looking at a truck that's had its engine let go due to ceramic plungers and have the opportunity to pick up a complete 871 cheaply, was looking at it for cheap insurance in case the 2250 motor had spun a main.