your clunk your strut top hat bearing is effed. your easiest and bolt on fix is to find a complete set of 280zx struts and brakes and put the whole assembly in it.
you can use s13 stuff if you get the knuckle, brakes, strut, top hat basically the whole assembly. i think it will go on the stock ball joint (check it out). you may have to use an adjustable height outer tie rod end to get the bump steer back in check.
you will also need new s13 front brake hoses, the stock ones aint gonna work. you may also need to upsize your master cylinder to get enough fluid flow with the larger front brakes.
if your this far in it would wise to put in new ball joints, bushings, replace the bushings in the idler arm, etc.