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if they are standard mahle pistons with ford rods they need pressing out, or if you are feeling a bit homebrew a socket slightly smaller than the pin, and a big hammer
As above, heat the up (properly fucking hot) and tap the pin out.
TBH you are best off taking them to a local engine shop as they will have a decent press and piston support. Many places don't like doing them because they crack the skirts because the piston is badly supported.