You better change your handle Dude
Ain't nothing x about your sharpness and knowledge from where I am sitting.
I was paying so much attention to the appearance of inclomplete combustion and where it was hot at only one spot that I failed to see the oil trails from the gas ports. Good catch, sir.
My sucessful ring package with Normal aspirated higher rpm engines;
Total Seal AP Stainless top ring .043 cut to a radial thickness of .135 using .040 gas ports with no chamfer. 2nd ring Napier .043 radial thickness of .145 gapped at what is recommended by Total Seal, same as with Top ring, as recommended. Oil package is regular or standard tension oil rings every since 1981, no light oil rings for me.
Mix all that well and stir in some Total Seal Qucik-Seat with AP4 ring pre-lube used as recommended. Break in by loading engine either on dyno or in car but first several minutes I let engine run high idle, kill, check everything, I like it all to get cold then. Next ready for the re-torquing if needed. Check it anyway.
Fire it up again, tweek, tune etc, and start loading the engine at upper rpm;s after loading a few times, kill, check everything, adjsut what is needed and next time go for broke. Never let new engine idle if you can keep it from idling. Actually it is harder on a race engine to idle than it is to get down the track.
I know you already know stuff I wrote but many look at these threads, that might not know some of it.
I would like to see corrosponding pics of combustion chambers, surely you took some?
What rod and quench are you set up to run with this? I see little evidence if any of a squish effct on those pistons. I flat don't like that burn pattern.
You are making good power already, it can only get better. I try to get a good even burn all the way across with the fire quenching just before the inside edge of piston. With a nitrous engine which I do a lot of now, that burn pattern is not easy if not impossible for me to get, but with all normal aspirated stuff, I can usually achieve it, but with some engines, it takes a few tries of changing things each time it is down.