I have an NOS (still in MOPAR box) 6545 TQ, Chrysler part #3751472, but it's for 74-77 440, so don't think it would work for you.
Lastly AutoLine has a part number #6058 (that's not a Carter part number!) and it's supposed to be a rebuilt TQ replacement for 1974 360 HP....which would be your 6453S. It's available from Rock Auto or Advance Auto Parts. Might be worth an inquiry to them to check to see what the Carter part number is on the carb. You just might get lucky!