You just chimed back in after 2 years, so go ahead & set the stage for where we're at in this story now.
- 2 years ago, the car would successfully start on its own.
- The car would hold an idle just fine.
- You removed some spark plugs and learned that they needed to be changed. Did you end up changing them all out for new ones?
- You had previously mentioned replacing the fuel filter with a new one. Did you go through with this?
- In the last two years, have you been driving the car at all? If so, how often.
- Does the car currently start?
- Does it currently hold an idle?
- You should definitely change the oil & oil filter.
- If the car has been sitting, then for how long has it been sitting & how much gas has been sitting that tank?
You don't need someone who "know Camaros" to come to your house & look your car over. At this point, someone who knows how to safely set up jack stands & change spark plugs, and knows a thing or two about carburetors will do.