Hy Pre '68 Dave and guys, while it is true that the 224 and 235 share the same standard bore size of 3 9/16" they do not share the same stroke. The 224 has a stroke of 3 3/4", the 235 has a stroke of 3 15/16", this may result in a difference in compression height. The two pistons don't appear to have any in-common part numbers according to my parts book.
