A friend brought over a 440 in a "basket" for me to assemble. I thought.. no problem as all the parts were new or rebuilt. When I came to putting on the water pump and that big cast piece it attaches to, maybe you would call it the water manifold?, I found that the big casting interferes with the timing cover and won't pull up tight to the block without crushing the timing cover. Obviously I have mis-matched parts here, but which one? What casting do I need? Or are they all the same? Is it the chain cover? Any help is welcome, thanks, Tranzman