1969 Dodge Dart Engine Stutter

On mopars there is zero connection between transmission fluid, engine oil, and power steering, so it's somehow splashing from somewhere else, or else you somehow spilled a bit and it dripped/ blew down there. The only possible connection is if the heat exchanger in the radiator leaks, you can get ATF in the coolant, and of course such things as blown head gaskets or cracked heads/ block can put engine oil in the coolant and so on

I don't have an answer for you except it might be an idea to pressure wash the engine