My thoughts would be:

* setback barrel (if you've got enough shank/reinforce length);
* rechamber;
* Modify mag well on bottom metal to latch on existing SKK mags (don't modify each mag if you can get away with it);
* Extractor may need modification (don't have cartridge dimensions at hand)

I've seen it done to a Carcano and I believe (??) I've seen it done to a Smelly.