Hey Don, the Angel is the local name for the snowpatch that hangs around into late summer in the bottom of the NW bowl. They climbed east out of that to gain the North or NW ridge (not the west ridge) up a couloir that is hidden from most places but very obvious when you are in the NW bowl, then up the crest of the N ridge to, it sounds like join your 1976 route. Sounds like they took almost exactly the same approach as Fred and I to the bowl, at least, it makes sense to me.
I'll make a little photo topo... hang on