If I can add my two pennorth, I know nothing about Appia engines, like most of you do, but I have built a lot of race and road engines and I wouldn`t be happy about the state of that bearing. It looks badly marked up like there`s not enough running clearance. I would advise that you purchase some " Plastigauge" and check the clearances on all the journals. The instructions are in the packet. It really is essential when reassembling an engine because you never can be sure that the crank has been ground correctly, I don`t care how good you think your machine shop is, check it! Also it appears from your photo that the thrust face hasn`t even contacted the crank, maybe the radius hasn`t been ground correctly? Not casting aspersions, just suggesting you check.