Chuck, they are the same as a few of the engines which use either the "F" or "M" type cylinder. In other cases the basic cylinder design is the same but may differ on the length dimension, And of course many of Elmer's engines do not use either of these two basic types of cylinders shown in the appendix. So the answer is a mixed bag. If you were thinking of casting the basic "F" and "M" type cylinders, then just thumbing through the book I would say they would only match maybe 5-6 of the engines dimension for dimension. With a little more time I could give you a more difinitiive answer but this will be close.
Bill