Any LowBuck but STRONG overdrive option?

A friend of mine dad builds a 727 he was a tranny guy so masshole through the car in reverse and screwed it up but that's a 3-speed he said he had a lockup 727 he gave it to me actually it's sitting over in the yard but I don't know if that's actually a 3-speed lockup or not

All 727s are three speeds.