[krisr]

Originally Posted by KEN CROCIE

Getting back to "design flaw".
The design flaw is that the engineers who designed the Pontiac engine in or about 1953 did not anticipate a roller cam would be installed, 60 years later, that had so much lift and duration that the lifter bores would snap off as a result.
Could it be the open design of the lifter valley was used to promote and ensure lifter lubrication?

I agree that the open lifter bores + the roller camshafts that we're running today is probably the "suggested flaw", but it's because we are operating outside of the limits of the blocks original intended purpose. But it's an easily correctable flaw as is with technology advancements today we can reinforce the bores and enjoy life. </thread>