Yeah it would be easier to get the whole motor swapped as I beleive you have to have the heads and intakes from the SC engine and probably the wiring and some other things I'm sure. Plus the bottom end is stronger on the SC motor to handle the roots blower, ours is not strong enough without swapping pistons and rods to something of the forged kind.
Buy the whole motor clean it up and swap it in, it would be alot less of a headache.