RhinoDart brings up a good point of the trans having been in another car, perhaps had an issue and was yanked, fixed and re-installed in this car. I have seen a number of '70 4 speed transmissions markings but have not seen a white X or the large part number stamped in more than one place - or on top. Come to think of it, the shift plate did not have any paint markings on it which most do... wonder if that might have been a problem that needed correcting???