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I really doubt you've jumped timing, especially from your description. When timing jumps, it results in an abrupt and immediate problem. You're describing a gradual degredation instead. It's significant to me that you were able to drive it fine once it warmed up, and drive it to put it away. This leads me away from the fuel system. It does lead me towards both compression and electrical. You can do an effective compression test with just your thumb over the plug holes. If you can seal it with the engine cranking, compression is low. If it gets by your thumb, compression is probably ok. I would just knock this one out of the way quickly to be sure. I suspect you've got electrical problems. Not necessarily ignition problems either. I'd start at one side of the battery, and walk the circuit all the way around to the other side of the battery, examining the condition of all the connections. Making sure adequate electricity is getting to the starter motor to spin it over well, and to the distributor for good spark. New points and new condenser, ok, but are they any good? I've had brand new points be defective, and coils. Check them to make sure they actually operate, and not just that they look good to the eye. Weak spark, especially on the end cylinders. Ok. How straight is that distributor shaft? Check the point gap on all four lobe points. With the cap off, you can also spend some time admiring the spark coming out of the coil from each of those lobes. Watch it and see how consistent it looks. If it is weak, figure it out and fix it. Examine the spark at the ends of each of the plug lines. The spark should be the same. If it's not, figure it out and fix it. Normally, bad plug wires ensure short circuiting. But on N's, I've been amazed at how bad the wires can be, and the engine still work. Mine is a great example of this. I speculate it's because of the low compression. Regardless, these engines are very tolerant of poor wires. You may well be flooded. Darned if I can figure out how you can flood an updraft carburetor, but you certainly can. It will work by the rings eventually. But cranking the engine with the plugs out helps a lot. Have a care with sparks under these conditions. It's a remote chance, but I wouldn't care to have a spark plug sitting on top of the engine ignite a cylinder, blowing the spark plug into the gas tank. Take some breaks for thinking. Kick back, have a cup of coffee, and ponder things every once in a while as you work out the problem. You'll find it, and be a better mechanic for it.
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