You just need to take your drums and shoes to any repair shop so they can measure each drum and arc the 2 shoes accordenly maybe . It is always good to put some braking miles on new shoes then re-adjust them.
Where did you get the shoes ?
Call these 356 brake guys.
https://mwthemachineshop.com/porsche-356-brake-drums
Bill Brown in Lincoln Nebraska sell 356 shoes.