1972 dart 360 with 904

You have a factory flexplate and a weighted convertor and you want a factory style convertor. You HAVE exactly what you need already. No need to change anything. So more than likely you have the 999 trans. Give me the trans part number.
Again - I have a standard factory flex plate and original converter with weights .
What I wanted was a new original style converter but none are made

so new plan is
what I need is a new flex plate with notch cut out and I just ordered it . I now need a zero balance 904 converter . No one has them .