Can someone give me an interior measurement on a KZH 106?

Hi folks
I'm planning on getting a KZH106. I sleep in a hammock typically and would like to be able to hang it inside the vehicle.
I'm interested in the dimension from where rear view mirror would be... To some secure piece of the frame... To a similar point in the rear. Suspension points. If I could get that distance, it would help a great deal in my planning. I don't have a vehicle locally that I can examine.
Thanks!