Talk about a slippery slope. @comnoz is redoing the barrel and the head will need to be done next. So you can't put those refreshed parts on just any case. And you can't put the ancillary parts on a clean case. And so on... The good news is the parts look great. The bad news is that the grease and dirt hide things that you need to now address. Before (For the last time the mark by the mounting hole is a casting mark!) But... Just smear it with some JB Weld? Throw it away and get another one? Get it welded up and re-machined?