I found a new 3-groove HB at ventureproducts.com for $108. It's listed as covering 67-74, so I though that I was close enough. Then I read an email from '68OrangeSunshine that said they changed the crank in 67. So, I don't know how it's gonna work. I'm sure it will fit, but I don't know if it will balance my engine correctly.
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Michael
Atlanta, Ga
64 Chevy Burb W/292