415HP from 318ci IS POSSABLE!!

yes the magnum roller blocks share the same journal size but the 318 is internaly ballanced where as the 360 is not.Also if you want to run a carb the earlier LA motor accessories such as waterpump and timing cover w/fuel pump will bolt up,or you can leave it in stock roller form and run fuel injection .And you can adapt chev roller rockers to it if need be.One other thing,there is a s--t load of them around.