71 Duster 360 (new project)

Factory framerails, in the factory location?

Sorry for the bother but I'm getting ready to cut out my wheel house and narrow my 9".
I would like to be able to run a 15x10.50x29 but I dont wanna buy that tall of a tire just to find out it hits the package tray or the frame rails.

Would you share a few pics of the tires in the wheelhouse?