Gould I have a 1973 Fiberform 26 with 1700 hours and it just keeps
ticking and ticking it's a Ford 301 with a mercruse alpha drive. I
changed the oil in 1989 filters in 2000, It will not quit.


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With luck like that, you should have purchased a lottery ticket, not a
boat.

Do you recommend your "maintenance program" to others?

A 33-year old boat with 1700 hours falls into the category, "probably
not a high priority in somebody's life- and therefore may not be
regularly maintained."
If you last changed your oil 16 years ago and your filters
in the year 2000- you do fit the profile.