Karlos, IMO its a cunt to change the piston only, and i've got a press in the shed. You need to properly support the piston whilst you press out (then in) the pin otherwise you crack the skirt. You could try heating the piston and tapping out the pin i guess??
Pistons with rods (standard) come up on the bay a fair bit for next to nothing, and if one piston is like it i would deffo check the others VERY carefully lol.
PS, cleaned the block today mate and it all looks good, cheers

off to the machinist on friday
Rob,