My 65 has run a bit rich since we got it running again. I wasn't worried about that. Ever since the weather cooled down this fall, it seems that our Mustang has been running rich. I'm not sure if thats the case though. It doesn't smoke at all, but the exhaust smell is really strong behind the car when its running evan after it is warmed up and has been driven. Its strong enough that when driving for more that about 30 minutes causes our clothes smell like exhaust and fuel. After driving for a while and my eyes are irritated. I can not find any exhaust leaks. Also, it seems to be using quite a bit more fuel since the weather is cooler. Does anyone have any ideas what the issue is?