I just got off the phone with Luis and asked him how many engines he has seen where clearancing was an issue.
He stated that he has seen about 8 race engines that was caused by clearance issue. And about 2 street driven car because of the issue. That's close to 30 years of him building engines... I'm guessing well over 300 engines? He didn't know exactly how many engine he broke down.
He also emphasized that 2 street driven cars were because the owners were revving beyond 8K as they were driven 'the hell out of those cars'. He also made a point to me that its very uncommon for engine that followed stock spec clearance will have issues when used on street. Also, he said its "waste of money" to do it on a street car as its NOT necessary.
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