Timing belt and water pump for sure and it would also be a good time to replace the starter since you'll have the intake manifold off. But wouldn't it make more sense to replace the engine with a lower mileage one from a salvage yard instead of spending all that time and money rebuilding just the top end on a 300k mile engine? I know a "lower mileage" 03-04 non-VVT 4.7L engine can be had for relatively cheap compared to its 05+ VVT counterpart.

I was faced with a similar situation when my radiator cracked which caused the engine to overheat but ultimately I decided to fix it after pulling the heads and seeing that the cylinder walls, cams, ect had very minimal wear.