[GTO JOHN]

I had a similar problem on my 69 LeMans unfortunately the hood latch failed and was stuck closed. We ended up having to unbolt the latch to free the hood. This is difficult with the hood closed of course.

If the latch is still good try pushing down on the hood while continuosly pulling on the hood release rod. If the hood comes up partially, then slightly push down on the hood and again pull the release rod holding it continuously while then trying to raise the hood.

There seems to be a dual catch on those latches maybe a safety latch of some kind. Good luck