From what I have been told the cranks are usually good to go. As long as the flywheel hasn't been machined that only leaves the pistons and rods. Those can be DIYed if you have a good scale. The rods should be done end to end. There is a lot of info if you Google.
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Gordon
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'71 911 Coupe 3,0L
outlawed
#56 PCA Redwood Region, GGR, NASA, Speed SF
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