452 heads

Ok maybe im misleading here. I dont have heads. This was the sale ad:

i have a pair of ported 452 big block heads i need to sell. these heads flow 268/220 around 500-550 lift. stock small valves with upgraded hemi type springs and retainers. they can bolt on a milder engine as is worry free or do as you wish with bigger valves etc if thats what you want.