My first low deck pump gas stroker motor was a 400 block bored to 4.375 bore size with a 4.250 stroker crank in it. I had a set of iron 906 heads on it with big valves, 2.14 intakes with 1.81 exhaust mildly ported and polished, they flow a little better than a well prep set of NHRA legal stock set
I had a low deck six pack intake on it with a set of stock type 1970 Holley 440 six pack carbs set up well, that motor made 612 HP @5500 RPM and 644 Ft. Lbs. torque at 4500 RPM with 9.25 to 1 comp. ratio using CA pump swill back in 2002
A single four barrel carb with a decent aluminum dual plane intake might loose 10 to 20 HP depending on the size of the carb and how well it is tuned to the motor and the intake that is on it. On your deal with a little less C.I. you might struggle to make 560 to 590 HP with 600+ Ft. torque, still way more than you have now
If I was in your seat I would put a set of the Trick Flow 240 heads and a Eddy Performer RPM intake with a carb you like and go have fun spinning the tires off that rascal