1964 a833 hard to get into first gear

Dana67Dart said
So if the op can shift into all other gears with engine running, car at a stand still and clutch pedal pressed all the way down, doesn't that point to some other issue?

I agree the gap at the bearing and fingers is a critical gap

Yes, could be a simple shifter adjustment or a internal issue. But before we go there check all the basics. Never over look the obvious.