Hey newbies, the 3.0 has had many changes over the past 60 years, the 4.3 has had significantly more, the 5.0 and 5.7 are not far behind.
Saying help, my mercruiser 5.7 has issues is like saying, help, my Ford F150 has issues (there have been over 30 sub-models of Ford F150 over the past 50...