It was finally time for an initial test drive where we tuned the carburetor on a chassis dyno. We learned several things after warming up the car and running it on the rollers. We found the used rear differential to be worn out and the gears and housing were rusty. The posi unit chattered like crazy and the clutches were gone, so we installed a new set of gears and a Detroit True Trac differential to remedy that problem.
Changing the rear gear also required the installation of a new Speedometer drive gear.
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