no, they were always the same dimensions.
I forget exactly when the first Wing Ding's were released (could have been like 1972 or 1973 or 1974?), anyway they were initally sized for the displacement's used of the time- ie. 60 boats were using .60cu engines, 40 boats were using .40cu engines, etc.,....As the years moved on the 60 class boats were using .65cu and .67cu, 40 class boats were using .45cu . The newer generation schneurle ported/rear induction engines became so much more powerful that the larger footprint 60 class Wing Ding suited itself better for the newer .45cu displacement engines. Although people ran .65/.67cu engines in the 60 class Wing Ding as well, but I preferred a longer boat (for 60 or "C" class myself).