Highest flowing sbm heads?

I'm talking about a NA 6.4 Hemi, like in a Scat Pak. They have about 550 gross hp as sitting box-stock. Just a cam upgrade and headers and they go over 600+ HP. Put that in a 3000 lbs Duster backed by a 904 and a quality converter and see what it runs. I'm talk'n 600 hp the cheapest, and reliable way that drives great on the streets.
Drives great on the streets, LOL, this might be my favorite.......hey everybody see how smooth my Gen 3 Hemi idles? Ewwwww sooooo smooth...how did you get it to do that, LOL, and here I pull up setting off other vehicles car alarms and things vibrate off the shelves in nearby stores with a badass W9 old school NA small block......YUP I'M A BAD MF'er :usflag: