This topic explains what I thought were oddball parts, tech wiki shows a different part number for the A13 rod, I had a box full of rods some of which were 133mm and some of those had smaller pin diameter but I can't remember if they were indeed 17.5 but after reading this they would have to be. The taller block requires the 133mm rod but the A12/A13 piston would require a 17.5mm pin so that explains what I thought were odd ball rods.

Tom