64 Dart Gt 4 speed won’t shift into gear ??

I'd have to see it to believe it as all the spring does is guarantee the throw out bearing isn't along for the ride on the pressure plate fingers!
That what I told my dad to but he said if the spring is to tight it won’t let the throw out bearing contact the fingers properly. So I’m assuming that the spring was only giving pressure to one side of the throw out bearing and not letting it have full contact on all the fingers