Greetings and questions Options

[METDeath]

Hey folks, I finally signed up on 6gc after a long time lurking pressure2's howto 5s-fte post.

I have a 5th gen GT coupe, that I daily and is my mild project (suspension and appearance parts).

Anyway, part of what brought me over here was the desire for a 6th gen ST hatch, and I had some general questions.

When did the 6th gens get OBD-II?

Is there factory wiring for fog lights on the ST trim level?

Was there a premium sound system (like the System 10 on 5th gens)?
If so, is there wiring for that in the ST?

What's the lug pattern on an ST?

Are all wheel disc brakes available?
If not, is it an easy swap?

Also, what do the ST's typically weigh in at?

Basically I'm looking for the "best" ST to upgrade to a GT4 bumper hood and swap a 2ZZ-GE into.

[METDeath]

I've seen threads about guys replacing 4a-fe/ges with 2zz's all they have to do is machine one bolt hole to be different, and then rest of the mounts and such line up just fine.