No, if they don't fit snuggly over the centre bores, they'll be unbalanced - even if the wheel nuts are done up tight ad evenly. It will feel like pig to drive, and I think I might be right in saying that it's also potentially dangerous
I should have said, if they don't go on easily don't force them on, I guess expansion of the front hubs due to brake soak could possibly crack a wheel that was a very tight fit.