I don't see how your crankshaft journals/big end shells would survive so much crankcase contamination without being damaged. Also, while I'm never surprised at seeing engines run that have significant amounts of wear, if I opened up my engine and saw that much blackness in the crankcase, that engine would be coming apart now, instead of waiting for it to either explode at high rpm's or start knocking bad enough for me to know it's going to fail soon.
Granted, I have run lawnmowers that looked like that until a rod broke, then just swapped in a new engine... Probably not a good choice for a commando engine, because as a bike you will ride, the value of your commando is based on having good working internals, not original paint...
... And BTW, the title, "what am i getting myself into combat build" can be looked at as "What am I going to get out of it once it's finished!" The effort is equal to the reward...
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