I got no idea about the clutch. I'm not sure I understand whats going on.

But with the oil.

Just crank it over as you would normally and when she fires up and starts to run check that the rockers are oiling etc.

You can remove the spark plugs and spin it over using the starter motor just to get some flow happening (careful not to burn anything out). But if everything is a okay and put together as it should then you should see good oil pressure when it starts.

Have you got an oil pressure gauge that you can plug in for the time being?