That info shows what is different between the designations, I can't see them tooling up for different con rods and heads. Even other parts that may need a change are likely done by machining them to different dimensions.
You have to love those odd fractional dimensions of that era, like the Bore and Strokes.


Kicking self for selling off my Taskforce trucks.
Still looking for an LCF or conventional big bolt in decent shape.


As of 10-26-2022, A 55.2 Taskforce long bed now the work begins