440 six pack pistons and some questions

Do they need to be forged for your app? Planning on spray or something? Low RPM's shouldn't pose a problem for any stock cast 10.0:1 slug,KB's etc., just curious.........
I ran the stk. cast 9.2:1 slugs in my 383, bangin' the 4gear at 6,600 w/a 125Hp shot of NOS, and I beat the piss out of that eng.! Just sayin'.....