I don't think any of the GMC engines were splash oilers but even if they were that would not make it a bad engine. A zillion Chevies ran and still run that way and give great service. I really don't understand the widespread and I beleive misunderstood bias against those engines. They were every bit as good as the flathead F*%ds and Chrysler engines of the day. And now everyone seems to want a flathead V8.
