To convert from superstrut to regular suspension you're going to have to replace EVERYTHING. The entire front suspension system. Possibly even the swaybar and end links. Struts, steering knuckles (along with hubs and bearings), control arms, probably outer tie rods, front rotors, calipers and pads. Going to make a BIG difference in braking power.
I've never had to register a car in Ca, so I can't speak from firsthand knowledge, but I've read a bit about it.
I do know that different counties in Ca implement emissions rules differently. They either have different rules or they enforce them differently. Some are more strict than others.
I don't know if they have different regulations for non US cars that are imported or not. If they require them to follow the exact same rules as US cars I can't see how you'll be able to register without fudging something.
If your car is registered as 96 ^ they're going to want to hook it to an OBDII machine I would think. Your ECU isn't going to be able to communicate.
Also, at least some inspection stations (probably depends on county) will try to physically test your EGR system if it's a 95 or older. You flat out don't have one so it can't be tested. Unless they have different rules for non US spec cars that's a failure right there.
There might be other issues too.
Like I said, I don't have firsthand knowledge of this, and there may be different rules for non US cars. Just be aware of this stuff before you go.