340 Duster oil looks milky

Yes but was it run for break in?....was the cam run in?... after the build had it been run at all?
I appreciate you guys’ trying to help!
The crappy part is he won’t give me a straight answer (poor lad is around 80) when I asked after all these issues he said he’s never done a cam break in and never had an issue! Lol not at all what I was wanting to hear. All I know is I can see the gaskets looked to be new and when I couldn’t get it to start I took it down to him and he found the cam timing didn’t get lined up right when they installed it (his brother was the builder) he said it was good to go so I brought it back to my place and changed oil and now here we are..