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A few things I see here.
The camshaft determines the firing order from the grinding manufacturer, how it is timed to the crankshaft does not alter the firing order.
No fuel filter is bad.
What carburetor do you have on here?
I would say it would have some rubbish in there.
Is it only cylinder 3 that shows no change? Have you tried this on all other cylinders?
That's good it has a fuel filter.
If you tell me what the carb is, could be a Rochester Quadrajet, or Holley etc?
Your driver side 3rd back is cylinder 5, numbers 1,3,5,7 on drivers side.
Sounds like you have a bad cylinder NO. 5, new plugs and wires didn't help.
Are you saying this one and the rear cylinder (7) have abnormal compression?
Compression is not always accurate, a leakdown test is more accurate.
How old is the fuel? Does it have trouble starting?
Can we continue tomorrow Todd?
It is 10pm for me here.
You can give me more info when you are free, and I will check back in the morning.