I replaced:
Timing chain
Cam sprocket
Crank sprocket
Oil Pump
Water Pump
T Stat
I used engnbldr's kit MINUS the gaskets. Bought Toyota gaskets. As well, Water pump and Oil pump came from Toyota.
If your truck has a lot of miles (150k or so) might as well replace your alternator brushes while the engine bay is clear. I wish someone would have suggested that to me ( : Now I have alt issues at 185k miles.
Anyhoo, my cam/crank sprocket were not really in need of replacing BUT they come with the kit so I replaced them.
Might as well set the valves and check distributor/plugs/plug wires.