fluid type for A-518

so this has been solved aparently... i called the transmission shop back and talked to the guy who left me the voice mail and he said, we had to send the torque converter back to the place that we get them from and they are going to send us a new converter to put on your truck.
I said so what happened? he said the company thinks that the converter you had may have came un-balanced... whatever that means, anyways he said this coming tuesday they should have it done. so im going to ask them guys about running type f in that transmission, but since jug head and a few other people i know have used it without issues im thinking thats what i will run.
My old man swore by it in the 727s and i didnt know if having an overdrive would make it a different story for running type f but so far from what i have learned its not.