Getting a 318 running?

What all is unbolted on the engine? Sounds like the manifold was off? So at the least you need valve cover and intake manifold set.

Depending on how many miles "you think" is on the engine, I'd pull the pan and timing cover. Inspect and retorque rod and main bearings, and inspect and/ or replace the timing drive.

So you'd need a timing cover set and oil pan gasket.

I would not mess with pulling the pan / timing cover until after you test fire the engine