There are 12 the same which are tappet caps and inlet manifold to head
8 green ones go on NEW valve guides if you fit new
Two small same size go in the holes at end of head gasket where oil comes up
4 same size go on end caps on rocker cover
2 of the 3 the same are in base gasket round dowels with oil jets in
This leaves 2, one of them goes on the cam chain mechanism adjuster stud
Not sure about the last one