Wheel lug stud identification and or replacement

Agreed! And it’s pretty evident work has been done multiple times as you mentioned… and that’s what I’m hoping for. On the Rock auto page of your screenshot it shows a different application for front and rear… would I be fine to then just order 10 of front and 10 of rear and replace/convert all of them? Am I understanding that correctly?
yes BUT....

check the specs of what you have and what your buying to be sure.

also if the drums have never been off the hubs ( front only ) it is likely they are swaged on and requite additional work (grinding cutting etc) to remove. not doing that MIGHT make your hubs boat anchors