I wanted to check back in and give an update. I changed the spark plugs and I bought a new Edelbrock carb. It runs much better. Throttle is very snappy and the backfire is gone. I have not checked the spark plugs, but its on the to-do list after I drive it a bit more. It still has the goofy idle thing going on but I have narrowed that down to a minor bind/catch in my throttle cable. I did not change out the gas. I put on a new see-through fuel filter and the gas looks perfectly clean. There's not much left in there anyways. I appreciate everyone's help and if the problem returns, I'll be back!
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