Piston choice: hyper or forged???
I think I heard that hypers are stronger yet more brittle than most cast pistons......
Yup, this is true, the key to the hypers is it doesn't take on heat, so it doesn't exspand much at all, so you run tighter clearances, but the heat has to go somewhere, so it targets the top ring, thats why it needs a looser end gap, the downside to a hyper is its brittleness, its damn near like glass, they don't just break under hard conditions like cast or forged, they "explode" in pieces, i've run hypers in a .060' 360 with a tight wall clearance, i rapped it many times over 6K with no issues, but i like nitrous, hypers don't, a cast piston will take it more then hypers will.
Go with forged & don't look back, they will outlast your kids lol. Most of us older dudes remember back in the 70s 80s when many 446s were running around with good ol'e TRW power forged pistons, they were like the energizer, they kept going & going & going, thats all we had back then, & the engine wore out before the pistons did.