Gaskets, appropriate sealer, timing gear w/ cam lobe, push rod, manual, and someone to look over your shoulder, is all you need.
Check out the engine page of my website for some pictures.
BTW, you will have to remove the sump before you can get the accessory case off. If you want a forward facing sump, now's the time to install one.
One other thought, the accessory case in my pictures would only work with an oil screen, so I replaced that one with a third one that would accommodate an oil filter. Make sure your accessory case is what you want/need