So I finally got around to calling the CA auto resource board to inquire if my 4g63t swap would be infact smog/street legal in CA as I have heard many rumors and false information. So it turns out it IS legal in CA. Here are the rules of the swap
1. Engine must be from same model year or newer then vehicle being put into.
2. Engine must retain ALL smog elements that it came equipped with stock.
3. Engine must be from same family size of vehicles;
Ie; light duty vehicle to light duty vehicle only, hd to hd vehicle only. As long as your not putting an HD truck eng into a smaller vehicle or car/light duty truck engine into a HD truck you are fine.
4. If car is originally CA spec vehicle, engine to be swapped must be california spec