Are you a distributor for the part time kits?The kit consists of a spool and pair of manual locking hubs. I would strongly suggest using the Aisin hubs instead of the AVM brand hubs. They are just plane sexier and what Toyota’s actually came with.
It was suggested earlier that install takes 4 hours. This may be true if you put your rig on a lift and have done it several times. Otherwise it could take days.........
Also, read up on the need for either new birf’s or machining a new C clip groove into the outer shaft.