The entire shop would be complicated as they're already organized. That would mean a decert, then a year without representation then an NLRB election. I would not recommend that course of action and doubt the IBEW would get involved as it would be considered a raid on another union.
If you want to work out of an IBEW LU with outside jurisdiction you can look into it at your nearest LU with line jurisdiction.
"It is not the critic who counts:The credit belongs to the man who is actually in the arena" Teddy Roosevelt