Mine is the one that has the sides of the pan angled outward as is comes down. The one that interferes with the k-frame at the right front of the oil pan, and k-frame has to be notched to clear it. With all that shape the pan hits the k-frame on both sides and the trans is jammed up against the pinch weld in the trans tunnel at the cowl. With a 904 there may be just enough room to get it in with this oil pan but with a 727 like mine there is just not much room.