K car, anyone?

This isn't A-body, but it is "Mopar". Seen an old K car on the side of the road for sale last week and it got me to wondering how hard it would be to install a newer fuel injected sideways four banger into one? Maybe from an early 90's (what) LaBaron or something?

Just wondering, years ago we owned an "un-reliant" that was a pos (engine-wise), but with the price of gas and a newer power plant... Anyone have any ideas?
Thanks,
C