To Stroke, or not to Stroke

A 400 bored .030 over should yield a bore of 4.370. Since there`s around .002" in clearance between piston and bore, some machinists want the pistons first so they can bore the block to the pistons while others work the block and then buy the pistons. I bought pistons from 440source before and they were KB, I believe they also carry Ross. If you can find a local shop to deal with I would go that way, it`s a lot easier to work things in person than through the mail.