it was answered already:
"Anything is possible with the right amount of money. But right now the H22A would be the best swap. However a better power adder would be to turbo the F23. For about the same price as a swap you can put down 200whp on a moderate amount of boost with plenty of torque. An h22 only has 190 crank horsepower and not a lot of torque."

Do what he says.----^ your gonna spend say 5g's on an engine to only have 220hp.

With that same 5g's you could get a turbo setup and make more power than that K20 and still have money left over.