how can I tell if the intake is leaking coolant cant see the rear of engine on 1996 Chevrolet 1500 Pickup

already took fly wheel cover off to check freeze plugs not them leaking from the top drivers side of engine

Asked by for the 1996 Chevrolet 1500 Pickup
If you still have the bell housing off pressure test system while looking at rear of engine. Almost has to be the intake. May be able to rent a tester.
thank you already put the darn thing back together
Use a mirror or rent a video scope. Or see your mechanic.