Inconsistent idling problem

In response to the throttle shafts being worn, I failed to mention the 600 CFM Summit carb is only a couple of weeks old. I just recently replaced it, and it seemed substantially better from the start than the 750 Holley due to the fact that the engine is probably around 200 horse, and that was way too much carb for that engine.

The floats on that carb are clear, and it appears as though the fuel level is just below half on the sight plug, which they mention is the correct height.

I have tried figuring out the fuel smell, and last night when I drove it home from work I kept the car running in the garage, and went back and forth between the engine bay and the cab of the car and realized the smell is in the cab, but it is not strong in the engine bay. I traced all the lines from the tank to the fuel pump, and nothing appears to be leaking. I may have to drop the tank to see if I am missing something.

I did check the ground between the ECU and the battery and it seems to be solid. That was one of the areas I thought of also, since eratic spark would be the symptom.

I unfortunately think this may be a case of several things going wrong at the same time. I just had the same situation when my voltage regulator, ballast resistor and ignition switch all went out at the same time.