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.... chances are he would miss that the harmonic balancer bolt might have come loose and destroy his engine,
better safe than sorry .
The balancer is a press ( tight ) fit on the crank
Plenty of SBC's didn't even have the balancer bolt from the factory
More likely to have problems ( age related ) with the rubber disintegrating and the balancer coming apart leaving the hub with
NO bolt still attached to the crankshaft
...And sometimes the outer ring of the harmonic balancer walks into the timing chain cover and grinds a hole in it (fixed with JB Weld about 10 years ago -- new cover on there now):
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Slideshow: A Jaguar designer's personal project imagines what a modern front-engined Corvette might look like if Chevrolet revisited the golden age of the Stingray.