new motor blues

alright i got to tinker with it today i pluged all the vacume hoses off even pvc i don't have powerbrakes seems to be firing on #6 that way but surges so i hook the hoses backup #6 not hitting again but still surges? so do ya think blowed intake gasket or cracked intake? also on vacume gage goes from 10 to 13 pounds with hoses connected but 15-17 disconnected and ajusting carb don't do nothing if u turn it all the way in it will die other than that makes no difference? i always ajust carb to highest vacume it's a new carb :sad1: