HP 440 RATEING ... How much power will i have ?

yeh im not looking to do machine work .. but im useing that intake for now b/c i got it with the Motor .. and the carb ...

I wanna get at least 380 400 hp

i have to check the comp on the motor I kno its not stock !!! it does have manley head bolts cam intake oil pan ectttt..

its got springs and reatainers its gotta have head work !

Thanks angelo