will this cam fit it 318

That is a BIG BIG cam for a 318. Even if you built the rest of the motor to suit, the chances are it will want to peak somewhere past the point at which a hydraulic valvetrain tends to become unstable. It really suits more cubes, and plenty of compression. You'll be a heck of a lot happier if you pick something with no more than 224 degrees @ .050. And even thats pushing it with an otherwise stock motor.