[Yosemite Sam]

Keep on asking questions, believe it or not, we don't want you to have to do it over either.

Yes, always replace the plastic governor and the cross shaft when rebuilding an old Kohler.

You should be able to push the center button on the PTO enough that you can rotate it in the basket and line the slots up with the holes. You may have to get a little creative holding the engine and pushing the button while turning the PTO and lining up the slots and holes, but it can be done without all that much trouble, maybe incorporate the help of a friend or family member.