Thanks a bunch for the clarifications. I now feel more prepared. I understand there is some variation in the approach based on personal experience. I plan to keep the tractor and pass it to my son someday so I want a nice job that will last. I totally rebuilt the engine 10 years ago with help from this website and it turned out great. I remember how difficult it used to be to get quality information before the internet. This is great.
One more question: Would it be smart to invest in an HPLV gun?