I know my engine builder was impressed with the heads, he has built plenty of 1000+ hp Coyotes. It would be interesting to talk to Maskin or CHE about a billet block, digitizing and machine time would be the killer.
Ford has a 4.5 v6 used in NASCAR back in the 80's, a friend turbocharged one and put it in a coupe a while ago, it was a 900 HP package, then again it was close to 500 hp in NA trim.
13 V6 Coupe Base MT6
Home built 62mm Turbo Kit
"Old Bo and Luke didn't need no GPS or big old fancy computer cause the one thing those old Duke boys were good at was finding Cooter!"