Special tool manufacturing instructions. Take one 1. 25x10" iron pipe nipple, and with a Ford tool (big hammer), oval one end a little.
Then after you've pushed the shifter down and then rotated and pulled it out of the shifter tower, slide the new ST (special tool) into the coller with the spring, press down and rotate.
If the ST has been tuned correctly using the Ford tool, the shifter stub should lift out. If the ST does not fit properely, additional tuning may be required
Good luck, RJ