Highest flowing sbm heads?

6.4 Hemi, factory 485 "NET" hp. Tell me what that is in our dyno "GROSS" hp please. So we are around 550+ hp ??? bone stock and idling smooth??? Cam swap and good exhaust and we are over 600 hp.
You can "not" like it. You can defy it in our "older vehicles". You can stomp in front of the mirror. But in reality, you cannot get as much hp cheaper with same reliability with a "LA" build. And yes, I'm a realist. Sorry. :) The fastest, most powerful small blocks to EVER be produced in a factory mopar is the Gen III hemi's. Facts are facts, even if somebody doesn't like them.
My brother has a 2020 1320 challenger with a 6.4 with only a smaller crank pulley e85 tune on e85 he has been 11 flat at 4350 pounds. That comes out to 636 horsepower for a stock engine.