somethings not right here

trudysduster said
Its a 17" fan, 20" shroud and the mushroomed rivets are towards the engine. .

Bill you can take this to the bank:

That blade is correct for CW rotation as you had it propped against the siding. The round side of the rivets go to the rad as you seem to have.

You should see concave curve on the engine side of the blades, which you seem to have