If it is apart and std bearings will still work GO $ THE NEW, worth the money!
Get the bore info, it may not really be necessary to bore. Perhaps a clean up hone will do it and save the pistons.
I am curious as to why they say go .020" over, or is it they "happen" to have those pistons on the shelf and need to "sell" them. Or there is a lot of damage in one of the bores.
Do you know about where the compression was before dis-assembly? And why was it tore down in the first place. I have not read the entire thread
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Dave Neptune