Head and cam selection help for 440

If the goal is 550hp, the weight of your pistons in a non-issue.
Spending money there won’t get you any closer to 550hp.
what is the benifit of a light rotating assembly? I know it will rev quicker but i have heard many times that it doesnt really make it faster.. I just remember years ago when i built this thing, several people on moparts ragged on me for using such heavy pistons, and then not rebalancing it..I think hearing all that back then has haunted me..lol..here lately though i have had it out every weekend giving it heck and having fun!