Okay so here is the story. I'm in South Africa and my c6 automatic transmission in my 1969 390XR7 is leaking. It seems to be coming from around the nuetral safety switch and the oil pan seal. I can change the seal but the leak from above the pan is worrying me. What could it be? Also if i change the seal i will need to change all the oil as i cannot get ford type F transmission fluid here. I can however get Dextron III. Would that be alright? Please can someone help me as to what i should do?