I remember a strip run when I had a weak valve spring that caused me to float a valve in a 427 Chevy at about 8,300 RPMs, and that was with triple springs. That made a mighty big hole in that slug, and you should have seen what the slug hammering it back through the combustion chamber of the head did to that aluminum head. There was a whole lot of scrap going on during that expensive losing run. I have seen weak threads in a head allow a spark plug to blow out. It happens. But if an internal touching a plug is the cause of it jetisonning, well, rebuild time is coming very soon.
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Today's Featured Article - Museum Coverage: The Stuttgart Agricultural Museum - by Cindy Ladage. While cold wind was blowing back in Illinois, in Arkansas, daffodils were in bloom, and the Magnolia trees were adorned with fragrant blossoms. Stuttgart, Arkansas was the site of this year's winter Minneapolis Moline Collector's show February 25-27, 1999. The show was held at the Oliver Museum created by Don Oliver, the pioneer of the four wheel drive tractor. Oliver along with Gale Stroh and Kenneth Bull using Minneapolis Moline tractors and parts created what has become known as
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