I just bought a auotmeter cobalt air fuel gauge. where should i hook up the information wire directly to the o2 sencor? thanks

 

Yes, splice it right into the o2 wire.

 

o2 sensor is on drivers side header right ? just making sure.

 

Yep

 

You can do that but that means you must go through the firewall. I spliced mine to the wire at the ECM. This way all connections are in the car and no splicing in the engine compartment. On both your cars the wire from the O2 sensor will be the purple wire(412), pin D7 on the 32 pin connector (the big one).
IMO, this will give you the cleanest install.

-Ozzy

 

Sweet idea!