So next side job done: Steering gear changed, it was easier than expected but my time commitment was 10 hours, I have done this the first time.
Also good advises from
TX firefighter:
http://67-72chevytrucks.com/vboard/s...d.php?t=614332.
Power Lee steering:
https://leepowersteering.com/pages/h...entify-gearbox
Lesson learned:
Needs time
Pitman arm puller works great
Reed carefully the bleeding instruction.
You should have the right tool (socket for the pitman arm nut 1 5/16")
There is are difference between 7802644L (first design) and 7802644 (second design)- look e.g. for Edelmann spare Kits explanation: "The only difference between the two gear boxes is the Input Shaft Seal, the earlier models have a 13/16" OD Input Shaft and the later models have a 3/4" Input Shaft OD."