I'll be changing the pistons on my 360/426 stroker

For me, if it's more than a few grams..'like 9+grams heavy' I have it balanced.
You can grind/lighten the pistons around the pin boss underside , but after 4 or so grams you end up weakening the piston and create a potential for failure.
I've changed a single out a couple times and ground 5 grams out to bring it within 2 grams of the rest and it runs great with no vibration.
But at a point... what's the focus, saving money ? or a great running engine that lasts...
What's the weight diff?
Without that info there nothing to base an answer on.