.....there is an unattributed cutaway in his Dino 246 1958 chapter which seems to show tanks on left and right sides, plus the tail tanks. Nothing is specifically mentioned about them by year, but for 1960 he says
" .... for 1960 independent rear suspension was officially adopted and an improvement was sought for the weight distribution of the 246 by going back to side tanks, leaving the one in the tail for fuel reserve and oil. For the same reason the engine was moved back 25cms.; moreover, it was offset in the opposite direction, angled from left to right passing to the right of the driving seat. The gearbox lever was moved to the left..."
Does that help at all?
I made no claim that it was anything other than what was in the book. The interesting aspect is that Casucci suggested that they went back
to side tanks. To what vehicle as a base spec. and in what period he does not say, but I thought in view of the close scrutiny of this topic it might indicate that there might have been a similar installation on a 246 at some time prior to 1960. I have checked the same volumes as mentioned in other posts. Casucci's chapter titling simply goes by the model and year of introduction, hence his 156 chapter is for 1961 but covers up to 1963