carb size for 360

i have a duster 360 running 300 hp when rebuilt then i added hooker headers, pertronix ignitor 2 and flame thrower coil, 2 1/2 dual exhaust dynomax supertubo mufflers with h pipe, 600 eddy carb with eddy preformer intake, 489 case with suregrip 355 gears, clutch fan, with 904 trans and cooler any sense on how much hp might be running now? will holley bolt right on my intake without any mods thanks guys