1992 Camaro 5-speed 3.1 V-6

So I want headers...can't find any for the 3.1 but no problem finding the 2.8 pacesetters? Wondering if anyone knows where to find 3.1 headers or if I can just slap the 2.8 pacesetters on there because I'm pretty sure it will bolt right up because when I was a low on money and my engine was blown up I took a 2.8 out of a 84 and swapped damn near all components so I could hook my wiring harness up to the older motor and it worked! Fired up but I didnt have a manuel flywheel for the engine so vibrated a little too much....also when I originally got the car had big problems that had to do with o2 sensor...wondering if headers would mess with that?