Humm... I've come to the conclusion that you do need to pull the Radiator
and here is the reason for that.... you cannot get the valve cover off
with the right front frame bracket on there and to get that off you need to pull the radiator off.....
and that way you do not have to remove the top water pipe inlet.
so a slight change of stragities is called for....I'll pull the radiator and the right front frame piece and see what that get's me ! that should get the valve cover off and out so I can check the valve gap....
.....
Bob.