74 318 crankshaft

Hey thanks saetun im sure hopin to ,ill get a picture of the crank flange for you guys I did a coolant pressure test and found a small crack on intake where coolant temp sensor is and in my radiator but other than that nothing.. I pulled intake and the intake valley is very very clean. No milky oil or anything but its milky on the dip stick . So I'm kinda stuck on what other tests I can do before it comes to me havin to pull engine AGAIN. But I'm hoping I figure this out.