Well fwd VS rwd are totally different and not interchangeable, so forget about the fwd completely.

You can mix up NA and turbo heads of the same generation. You cannot mix and combination of a s14/15 with a s13 anything(in reguards to blocks, heads, and intake manifolds).

On the RWD I dont exactly know the differences between the turbo and non turbo head, but i dont imagine you would benifit in anyway by using the NA parts on a turbo setup