CnP (coil near plug) for big blocks

The coil brackets will work fine on a SB since a SB head is roughly the same size as a BB head. The coil pairs on this bracket are mounted about 9.5 inches apart. On a SB the perfect center to center distance would be 9.0 inches so that is not much difference. The coil pairs will only be 1/4 inch off center of the plugs which you probably won't even notice. You will need a set of valve covers with a flat top on them. I'm not sure if anyone makes a cast Magnum cover with a flat top so you might want to research that first.