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09-24-2012, 12:19 PM
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Registered User
Join Date: Aug 2011
Location: Gallatin, TN
Posts: 782
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Tach question
1977 C10, GEN II LT1-350, TH350 trans, 3:08 gears. 295/50/20 rear tires. At 75mph ( per my GPS) my tach shows 3900 RPM. I really don't think this is correct. Any ideas?
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77 C10, 6.0LS/4L80E, 3:73 12 bolt. Boss 338's 20" x 10" w/ 285/50/20 rear. 20" x 8.5" w/ 245/40/20 front. Vintage Air. Full Autometer gauges recessed in factory bezel (Thanks bigblock73!) Gm Storm Grey Metallic paint "Cool ain't ever cheap and cheap ain't ever cool" |
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