Transmission dipstick

[Yellabelly007]

Hi, I recently bought a 1972 F250 with what i believe to be the 360 engine. It was missing the dipstick for the transmission, I am not sure which transmission it has and what part to order. Does anyone know how i can figure this out and where to buy the right one, there seems to many different options. I tried LMC but they said they didn't carry them. Thanks.