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Wen it comes to accuracy there is no substitute for a good bore gauge that reads on .0001". You could use a snap gauge and mics to get a idea where your at but there are so many places in a bore to check it would be a real pia to check like that so many times. There are actually 4 points on a bore gauge, 3 center it and one does the measuring.
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Slideshow: The VelociRaptor Expedition gains a lift, upgraded suspension, Brembo brakes, and trail-ready equipment while retaining the stock 440-horsepower EcoBoost V6.
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.