I think the proper term is decoupled but yeah, you gotta pull the snout and install this metco tool to hold it still so you can get the bolt out. Depending on what pulley you install, you may not need to pull the snout to change it next time but you have to in order to get the stock one off.
You don’t have to completely pull the blower though, you can just tilt it up at the front to get the snout off. Be careful of those flimsy gaskets between the blower n engine though.