Major engine oil leakage that is bad to see where it is appearing from!

It leaks from under the oil filter housing & cannot see anything as to pin point!

It leak during warm up & when vehicle has been run for 30 mins. or more the leak seems to subside to a slight weep!

If i strip down everything to remove the oil filter housing I cannot run the engine to test for leaks from other areas!

It could be the head gasket but I fear strip down would not confirm this.

Has anyone repaired one of these before? I an in a dilemma