I just looked on merc card and found many listed
816082t old design with end caps out let points up 92 93
817577t new design appears same in pic
805561t1 shows p/s ports 93 95
806423t straight thru type with p/s ports shown 93 95 efi
849952t in and out lets point down with end caps 500 efi
need more info, there are 3 support bracket choices