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

yeh thanks for you help guys yeh the motor and the bottem end i was no planing on taking apart thats y i got a built motor already ,,, hopefull te heads are 915's with 1.74 exhaust.... if not i got a extra pair of 1967 383 915 heads but the motor was a 2bbl ?


What size CC are the 915's ?