Maybe Secrets of Speed Society (Ohio) is onto something. Have you inquired there?
I've done some head scratching on this for some time. Looks like the second transmission would be installed backward using a lathe-built coupler housing with the U-joint as the shaft coupler. Low-reverse on the rear transmission would be ommited. 2nd would be your overdrive, high would be direct drive. Lock the gear shifter into the 2nd/high gate. Respline the output shaft (previosly the input shaft) to take the U-joint. An adaptor plate can be fabricated to mount the rear bearing retainer/torque tube ball socket. Torque tube and driveshaft will have to be shortened accordingly. Speedo gear and rear axle gear ratios are co-ordinated, so speedometer accuracy is not affected. Only engine RPM will be reduced while in "overdrive". Let's get some feedback on this idea. Has anyone out there done this conversion?
