[FortyNiner]

The gotta have books would include:
Rebuilding the Famous Ford Flathead by Ron Bishop (he is active here as Ol' Ron
Ford Flathead Engines - How to Rebuild and Modify by Thacker and Herman

I would also suggest that you get a color-coded laminated wiring diagram - I used classiccarwiring.com. These are diagrams for stock 6 volt systems. The 12 volt systems have a few modifications depending on the power source.

If you don't have one, either get or get access to a decent torque wrench. It wil get a workout along with an engine lift.

In my case, I had the builder handle all the tough stuff - block cleaning, machining, and valve removal/installation. The builder also bought the new pistons, bearings, and seals. Unless you are daring, I would also have the builder install the main seals - this is the wrong item to mess up on a new build

Good luck and don't hesitate to ask any question.