cam degreeing needed?

If you have a decent quality timing set then you don't need to degree that cam in. Do you think Mopar degreed in every cam they ever placed in an engine. No.
Degreeing in a cam is no guarantee that it will be at the optimum setting for power. It simply gives you the cam manufactures ideal location and that it just a starting point for if you want to advance or retard the cam for tuning purposes.
If your going to talk about "machining tolerances" then you may as well check the location of every single lobe on that new cam because who's to say it's been machined correctly all the way along?