Yes, thank you for explaining PA's visual emissions inspections to me, since I am a licensed emissions inspector for the state of Pennsylvania.
It will ask about the EGR, the PCV, the evap system, the cat, AIR system and the heated air/fuel ration sensor. It's been a while since I did a visual only but I believe there is also an "other" category.
The standard is passing on the visual is if the original types of emissions control equipment are present and appear to be functioning. If someone brought me a vehicle that rolled off the line with EFI but had been swapped to a carb at the very least I am going to check "No" to the AF sensor, because a carb isn't doing anything with an oxygen sensor, which means said O2 sensor does not appear to be functioning. If I am correct about the "other" category I would fail it there too as I consider the MAF, and other sensors used in calculating the air/fuel ratio, as well as the injection system itself to part of the emissions controls.
Any honest inspector will fail it, even on a visual only inspection, so be prepared to keep it under 5K miles a year. And you can get away from it by moving the registration to a non-emissions county, since then you have the 42 county enhanced safety inspection, which asks the same questions and doesn't give you a 5K mile exemption option.