Compression Check Results and Plug Read.

I've got a couple hundred street miles on the car after getting it running with new AVS2 carb. I pulled the plugs to do a compression check and lined them up. They look decent to me but I'm no expert and would like to hear other opinions. Not sure if much can be told from those pics though. #1 at top left has an interesting heat pattern on the threads, not sure what that is about.

I did the compression check hot with the pictured results. Couldn't get the thing hooked up on 5 and 7 because of the header. Will require a different adapter to get around it. Was looking pretty good for the first four and then I was disappointed by the last two. Did them in order. Went back and confirmed #3 at the end. Based on that, any guesses at the static compression?

I don't know anything about the motor other than it is a 71 340 block with J heads and a stock-ish cam that doesn't seem to burn oil. I've added new AVS2 650 carb, RPM Air Gap, new plug wires and the timing was set to 15/16 initial and 36 all in, no vacuum advance. 73 electronic ignition and distributor when pics were taken. Now has an FBO box and limiter plate and I'm starting to work on the spring weights. Car runs pretty good but has lifter noise on 6 and 8.

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Looks like No 1 plug may have been loose at some in time, or a bad seal ring allowing combustion gases to get by the threads.
Heat range looks great, would not change it.
Timing marks on the ground strap looks to close to the threads, to much total advance? Did it ping? What rpm at 60mph?