assuming the person who used to own that 100k mile motor was actually maintaining it properly during its life and nothing got jolted inside when that said street car was wrecked.
If you have a GOOD engine builder that actually knows what he’s doing then your motor will last a long time as long as you treat it nicely. I had my motor built in 2013 and it makes pretty close to the same numbers now after 4yrs of thrashing on it.
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