These are completely compatible with the game's original (vanilla) trucks.
When use with the other MODs, please note the overlap/conflict of the files of the following directory in each SCS file.
*.scs/def/vehicle/addon_hookups/
If you sold all of these parts in the game before removing these MODs in the future, will not affect the compatibility of the save files.
If your player's level is less than the required level, these parts will not appear in the truck dealer and service. Required level of each is set the same as the game's parts or slightly higher.