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Classic GM Car Restoration
Retain the shift quality of your factory transmission while adding an overdrive with Gear Vendors Overdrive system.
Overdrive unit installed on a 1970 Olds 442 with a TH400 tranny
The unit bolts in place of the factory tail shaft housing.
Completed installation, with minor modification to the drive shaft tunnel, the cross member and, of course, shortening of the drive shaft.
Looking down the finished installation.