how do i know if my car is an obdI or obdII?

the car is a 1995 z28 vert.
my exh system comes with 2 cats
i dont see a crank pos sensor on my timing cover.

 

It's OBDI. OBDII started with the '96 models. The '95 models have an OBDII connector, so a lot of people think they are OBDII. Makes them hard to scan or pull codes without the proper cable.

 

You will have an emissions label on the radiator cover. It should look just like the one from Shoebox's 95, and will show OBD-I, as Dave explained. The code in the upper left corner ("YHM") will be different, since your dual cats indicate you have a "CA emissions" A4: