Aight heres the deal. My friend is real big into imports but he inhereted an 84"ish" z28. We dont know if it has a 305 or 350 but all I know is it has a q-jet. Now this is my problem. I was gonna help him out with cleaning it up and getting it running good. Every time I start the motor up it wants to die. I was thinking either it has a vacuum leak or the o2 sensor is bad. I have been trying to get him to sell it too me since he hates domestics plus this is a t-top, automatic, v8 car with less than 50k on this odometer. What do you think?