Certainly possible, it just depends how good your engineering skills are or how deep your pockets are.
you may be better looking at the Multiair turbo from the 124 abarth as this was at least an engine that was fitted as standard to the 500X and therefore may make for a slightly easier install, especially if the 500x has a 1.4 multiair engine already fitted.
No idea about the steering wheel but its probable you could get one to fit, these types of things tend to be fairly standard across a company like fiat.
It's worth noting they had intended to make an Abarth 500X but I think there was some overlap with other FCA brands like Alfa who where bringing out performance SUVs and so fiat canned the idea as they so often do if they think it will tread on the toes of one of their other brands.
Its a shame as a 500X abarth would have been an interesting car that may have sold well.