Here are a couple of side views from the Ferrari Dino manuals. The side views are identical in length and wheelbase - only difference is the bolt-on vs knock-on wheels. Therefore I suspect the 246 manual just shows a
206GT_side_manual1968.jpg
246GT_side_manual1971.jpg
246GT_top_manual1971.jpg
206GT_top_manual1968.jpgslightly altered 206 image.