In order to test drive these new values, you will need to make a custom material. Back in the fusion360 simulation workspace, go to materials > manage physical materials. Select ABS plastic. Add to my favorites. In the favorites you will now see ABS plastic. This is your custom new ABS plastic.

Right click this and rename to "PC-ABS custom" plastic. Double click to change the properties. Since you will be modifying the material properties of the ABS plastic template, choose a different color for the appearance for your new PC-ABS.

This helps to differentiate it from the stock fusion360 pc-abs plastic and makes it easier to verify that you have selected the correct pc-ABS plastic for your part.