Did you fill the oil rails up before trying to start it? If they are dry it will take forever for it to fill the rails up and build up pressure. Monitor ICP when cranking and see what it hits. most likely there is a lot of air in there. Once you get it started, you will need to drive it down the road and make a dozen or so stop to 60 mph fast accelerations to get the air out of the system so it starts normally. let me know what you find.