Change C15A Cab 13 for Cab12
 

I found a C15A Cab12 without drive train and i have a C15A Cab 13 y bad condition.
The frame is the same in both models?

At least the cab mounts will be different. Cabs 11 and 12 bolt down to the top rail of the frame while cab 13 has a mount each side of the frame at the front of the cab and a crossmember at the rear of the cab. Others may have more information to add.

Thanks Grant!
The steering column change too?
Clutch and Brake pedals linkage?

The pedals are definitely different (and the bracket that mounts them to the frame).
I think, but need to check the parts books, that the steering columns can be exchanged between cabs 11, 12 and 13.

Ok Grant, thank you.
Others pic.
What the roud hole behing head driver?

I haven't seen that hole before so my guess is that either it was done after military use or might have been done to provide a way for people in the rear body to communicate with the driver.

In this video can see the holes
https://youtube.com/shorts/YsRnWLNSOBo?feature=share

Neither do I. My bet is a post-war mod.
Also interesting to see that someone installed extra vent doors in the sides of the nose panels.....and L-shaped strengtheners securing the cab rear wall to the floor. I also spot remains of non-standard dash gauges in the gauge cluster and the obvious bars keeping the roof attached to the rest of the cab while driving at speed!
Interesting find Mariano!