If I replace both the camshaft sensor and crankshaft sensor will I need to have them synced? 03 5.7 hemi

 

No. The sensors are both just hall effect switches, they magnetically read a series of teeth or notches on the crankshaft and camshaft sprockets. They can be replaced without doing anything besides replacing them and resetting any codes they may have caused.

The best way to do that is to just disconnect the battery for the entire time youre changing the sensors. It should clear the codes and start the PCM learning over.

 

^^^ Correct

However, to add to this, everyone should download a copy of the Service Manual from the links in my signature for thier reference both present and future