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

Crawl underneath and take off the inspection cover. You should be able to adjust the linkage (if all is correct) so there is a small gap between the throw out bearing and the clutch fingers. I go for a 3/16" to 1/4" gap.
Yes there is a small gap between the throw out and the pressure plate. Not sure exactly how much but it’s not that big