What is not drilled the oil passages? In addition make sure you look at the rear main cap because most likely it is a dry sump style motor. The other thing is it is a 400 main 2.650 and most cranks are a 2.480 so it is a custom piece/crank or use a bearing spacer. Still might be interested if you care to share the details. But that block from what it sounds will take a lot of work to get operational.