Starting and Running Problem...

Today started up the car and heard a loud ticking sound. About a week ago I took off the valve cover to replace the gasket. Noticed some of the valves were loose so I tightened them by hand. Today I opened the cover back up and found that one nut on one of the valves was completely off and the other loose. This time I used my tools to tighten them. Put the valve cover back on and just like that no ticking. I also noticed that one of the spark plug wires was loose. I think I didn't put it on tight enough when I replaced the spark plugs that same day I did the gasket. Once that was fixed I tried to start her up again and she would just stall automatically. I had to keep my foot on the gas in order for it to keep running but while running it was backfiring like crazy. I took off the air filter to check the carb. and the flap would not close and I had someone start it while I looked at the connections of everything (no I don't know what everything is called yet... but there are springs and wires and such...pic below of the setup{and no I did not do any of changes, I know she's choking with that air filter if you can help with ideas on a replacement}) and it through a huge flame up. I had to get it home so I two-foot it all the way... gas and brake at the same time. But if the idle dropped to low it would first loose all power and then stall (turn signals would stop blinking and stay on steady no blinking and headlights would dim so you could not see the road and of course the loss of power steering) I had to start the car again in Neutral then two-foot it into drive.... I want to get this fixed tomorrow morning because I have a Mariners game to go to in the evening.... PLEASE HELP!!!! Any questions or suggestions would be GREAT!!!! Thanks so much FABO!!!!

Just a reminder... I am a new owner of an old school... so any knowledge is great knowledge!

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