Geoffrey
I have no first hand information, nor have I ever seen one.
But just checking the litterature shows some info in following standard Lancia books:
1. La Lancia, by Weerninck in all 3 editions: technical details and production quantities, by type, and one cross section of the petrol 0° V engine.
2. Storia della Lancia, in the last chapter by Rosani describing the car and truck production: there you get the main dimensions of the engines.
3. Camion Lancia by Condolo: many bodywork variants, including military
4. La Favolosa Lancia by Centenari: technical description of the 2 engines, and also details about front suspension, more modern than the then current Aurelia, with wishbones and a transverse leaf spring
There could be some more obscure camion books published in Italy, but I do not know them!