Just adding to Terry's list.
- Measure everything before you remove the old tubing!
It's fairly important that the shortening is exact.
- You might need to remove the brake line clips from the tube and weld them on after you're all done. Unless you have detachable ones already...
- You need a suitable tube to push the old one off the casing. You can use and old short piece of axle tubing, maybe slightly grinded undersize or just use lathe to make a suitbale. Sometimes the axletube requires a bit of heat to come off. Press stand needs to be pretty big and sturdy. Those pipes are built to stay inside that casting...
- I did my cutting with a hand grinder. If you have a good sturdy pipe cutter at hand, use that. Also, cut enough, otherwise you end up pressing the pipe back out and milling it again...
- Old side cover is a great backing plate when pressing the casting back into the tube. Measuring the new desired length is easy when you're pressing the casting back little by little.
- Make sure you drill and put the pin back on!!!