I agree, no pins are shown, and the usual rule is "only what you see". The perspective of the photos makes estimating the pin diameter (which I can sometimes do in Photoshop) impractical.
Those instructions are a bit scary. Mill the block (is that .125"? it's hard to see) to get the CR up suggests that there is no quench with stock deck height.
Perhaps with that mill the dome is flush with the deck, and the gasket thickness is the quench clearance?
Alcohol?
The description also says "270 head", but from the dome shape it only fits one type of chamber.
It's a good price if you can use them "as is", but if mods are needed a custom piston becomes more practical.
