1987 dodge ram 318 leaking a lot of coolant?

Ok my dodge ram leaks about a full radiator full of water in about 200 miles. I dont drive the truck much but anyways. The leak is from the rear of the motor. With the engine running and me on the ground drivers side, I see it coming from the very rear up high about the middle of the motor (valve cover area). Any place in general I should be looking? I know these things are prone to freeze plug leaks in the bell shousing , but if I see the water there I know its not a freeze plug. Intake manifold coolant cooled? I really dont know a lot about dodge's in general, hell I have never stripped a piston engine. i have done a TON of rotaries, but no piston motors. Although Im well versed around the outside of motors tho. Anyways, and ideas? Anyone have something similar to share?