[Lynn Eades]

Yes, Tony.W., I would recommend a practice. (sheep dag hones are great! They make any bore look good)
Pistons in a set, are not always the same size. In a factory assembly situation the standard pistons used to be graded for size (and or weight) so that an engine might end up with a set about the same. Hopefully the pistons in your set, have been graded (I would expect them to be these days) I would though, measure them.
Tony you will no doubt be setting up a financial relationship with an engine reconditioner for at least the sizing of your gudgeon (con rod) bushes, I am sure you can pick up some expert guidance from him/her (you never know) at the same time.