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

Nat said

THANKS GUYS I will weigh the pistons see if there is a difference between the new and old old bob weight was 1800 or so hope i don't have to rebalance . old days just swapped pistons , ogf course back then paid less for my car than the engine i built now , it will hurt if it grenades because i cheaped out

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One more thing I forgot to mention. It wouldn't hurt to consult with a knowledgeable cam guru to optimize your cam spec's to match the lower compression ratio. I can highly recommend Dwayne Porter, AndyF or Dave Hughes. There are others as well, but getting it right requires both knowledge and experience, which these guys have a lot of.