I have a 90 teg, but the engine is on its way out. it needs a swap, and im looking for a motor thatll make my car somewhat quicker, and that will also have a really good potential for boost.

I think i've narrowed it down to either the B20z, or the B20b. Both of those motors are OBD2, and im not sure about the conversion. i already know what i need, and all of that, i just would like to know how difficult itll be.

Also, how will emissions work on a car thats supposed to be OBD0 with an OBD2 engine in it?