Conversely, you can find deals on .030" over and .040" over pistons bought by people who found during machining that they needed .060" over. The shop that I use will do as little or as much work as I ask and pay for; if I really wanted to assemble it all myself (have done it before, my shop is not ideal for a slow build) I would pay for the machining and fitting of new pistons of the smallest oversize necessary. He charges me the same or better price for the same parts that I'd pay at Jegs or Summit.

First thing to do is to get it visually and dye or magnetically checked for cracks. Then prepare it for long term storage in a place safe from high humidity, animals, shins, moving vehicles...