It's not even worth it to attempt it. If you're going to do a motor swap, do the SR or DET. Not exactly "direct" swaps, but hell of a lot easier than a KA. You'd have to rig that up so custom it would be hella expensive.
Hmm, a RWD motor into a FWD car. Unless you mean the Altima version(I almost forgot about that one)
Ok, so what are you on and will you share it with me. j/k
Is it possible, yes
Is it fesable, hell no
Would this be your first hybrid? If so you should try to stick with an engine family that was available for your chassis as a first hybrid(or one really close).
Best bet would be to turbo that thing.. Any engine swap would be more expensive/troublesome than going turbo If you are doing it all yourself and its your first one.