Umm Why 600 HP ?
Have you ever driven anything with 600 hp ?
My Duster had 425 RWhp [ approx 550 gross hp ]& lifted the front wheels on the street , ran mid 11s in the 1/4 at 118 mph , the engine had no power below 3000 rpm made 3" of vacuum in neutral & was far from a streetable engine , I used the Mopar .590 cam & revved to 7200 rpm
now you want more power & driveability , you will need a roller cam to do that & alum heads , a supercharger may be the best approach