How difficult is it to turn an engine by hand?

I have most of my 340 together, no room to get a good grip on balancer to turn it, but when i get home in a couple days I'll post what my torque wrench takes to turn it over. It turns over pretty easily, no pushrods in yet. Clearances were checked.
It would be hard for you to properly torque down caps and have a bearing cockeyed, if not impossible. Really cant see that happening.