Back in 1961 I bored a '57 block 3/16" over and ran it thousands of miles as a Tri-Power 381 c.i. But in recent years, with wall thickness measuring available, a couple of '58 blocks were only safe thicknesses at 1/16" overbore. I guess I was just very lucky with the '57.
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Anybody else on this planet campaign a M/T hemi Pontiac for eleven seasons?
... or has built a record breaking DOHC hemi four cylinder Pontiac?
... or has driven a couple laps of Nuerburgring with Tri-Power Pontiac power?(back in 1967)
... or has a Pontiac born the same year as Jim Wangers? (1926} 
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