Well, my wife was right, as always.
It appears that the frame is a little torqued because of the flat front tire, and the general slope of the yard.
First we tried putting some pressure on the passenger's side of the hood, while she operated the 'spoon', which is what I call the secondary latch. No joy.
Finally I steeled myself and inserted the crowbar in the passenger's side of the hood, where we had been able to open a small gap.
With a small amount of pressure toward the driver's side, the 'spoon' finally released. There are two spots I will have to repaint, but no dents.
The lever that I had been playing with was the primary latch, and was not connected.
So, all you people who are having problems with wives and trucks might want to consider getting them involved in your projects. They're clever little devils, and I am sure that most won't try and take over the manly parts from you.