Okay, back to the tuning. I noticed that my front carb was leaking at the float bowl neck (where it attaches to the carb throat sandwiches between rubber washers). I took it off, inspected the washers and applied a thin layer of silicone sealant to the washers. Reinstalled and no leaks, but now on accel and overrun I am going way lean into the >15 range. Now the ambient temp is lower, I could have an exhaust leak, or maybe they're some crud or silicone in the jet. Car also will try to die on overrun when coming to a stop but idles well. Any thoughts? I do have oil in the dash pots.