Figure 1- Verifying TDC on Compression Stroke.

When the engine is in position, put the transmission back into 5th gear to prevent accidental cranking of the engine while replacing the cams.

You will need to remove the crank angle sensor.

Figure 2- Removing CAS

After the crank angle sensor is removed, remove the components on the exhaust camshaft side: cam towers, cam oil squirters, rocker arm stoppers (if installed).

All this comes out at once since they are all part of the same assembly.