318 running with low power - dyno
when it was on the dyno did u try carb jetting/measure air/fuel ratio? did u try more ignition advance? if u think peak hp is at a low rpm, the cam is not too big, too low rpm is stuff is too small. and is it a standard or auto trans? auto trans loss on the chassis dyno is more than standard. valve springs strong enough for 5500 rpm=110# seat and 280# open minimum. 1.88"/1.60" is perfect for a 318