Stock tachs blow...
I know this isn't what you probably want to hear, but one of the best things I ever bought was a Autometer Monster Tach. Stock tachs are worthless after 3-4 grand. Mine is off more than a grand at 5k actual RPM. (indicates 6k + on the stock)...
I never knew how bad I was missing my shift point.
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1988 GT Convertible
331 10:1 TW heads, GT-40 intake, MSD, TRW flattops, B Cam w/ 1.7's, MAC exhaust, 24's, 70 TB, 76 MAF, 3.73's, Pro 5.0, Koni's, Anderson PMS, Wideband 02, yatta, yatta...
One week with new motor, two speeding tickets...joy
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