Its not really needed - just torque down the main caps/plate with ARPs or stock bolts to spec - I have done quite a few like this with no issues! The trick is to be sure the shop only removes a little at a time and gives ample cooling time.
I have a buddy that would at a machine shop that can make them for around $400 - but we would have to get a group buy together as he wont do just 1. LMK if you want to get this together/going
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Just to be sure ...I need to go 87mm pistons .. youre saying I should just torque down the main caps / bolts to spec and then have the block bored a little at a time?