I am building a 572 amost like yours i think 850. It is a aluminum block with 440-1 heads out of the box & gear drive & 13 1/2 to 1 flat top pistons & 1.6 T&D rockers that make my cam 716 EXH 740 INT roller & 4150 intake indy & RUPERT 950 akcohol carb made for the motor . GO LUCK.