upper engine rattle

What kinda rattle? Whats it sound like? Where does it sound like it is coming from? Did you look at the pre-load on the lifters when you tightened your shafts down? Whats the story on piston clearance? New wrist pins? Floating? How were the bushings in your rods? Are your exhaust flanges loose? How about your power steering bracket? Did you check your crank pulley and water pump pulley?