Dumb question about 4 wheel drive on my 72 C20

[Brettd85]

OK dumb question...

I have a 1972 C20 4x4, picture below. It has factory front locking hubs. If I put it in 4 wheel drive with the hubs NOT locked, will I still get 4 wheel drive? Well technically 1 wheel rear and 1 front since they are open diffs. Or do I have to lock the front hubs for the fronts to get any power? Reason I ask is its snowing here and I figure with front hubs locked it could be annoying on the street taking turns and things if I encounter some road without snow. Thanks for helping a dummy.