I took the heads to be milled because the person who owned it before me blew the head gaskets. So I pulled the heads and all and i spoke with this reputable machinist supposedly and asked if i should pull the cams and and gears he said" no ...when they are in the top dead center of the compression stroke the valves are out of the way enough to mill them 5 thousands". ok cool....so i take them in and when i go to get them back I get a box of parts back...... I'm like WTF? I got the heads all back together except for the cam gears.....which gear goes on which...chiltons doesn't say much except mark the sides before you pull em off......any help with the passenger side part number would be great......