Triple Captain is spot on with his info.
Oh Thank-you.
The advantages of a Chieftain,
-wing lockers
Some of the later Navajo's do have wing lockers. The interesting thing is the Navajo's without wing lockers are lighter and either higher ZFW or MTOW (I cant remember exactly, it's been a while) but they will carry more.
The biggest problem without winglockers (Navajo) is the floor loading limit of 690kgs (freight config) which is quiet easy to reach which would limit you to a total of 781 kgs freight (91 nose + 690 inside).
And then there is the panther kit mmmmm
