Why not just mate a short Turbo 350 extension housing and output shaft to the torque tube transmission case, and make an adapter flange to mate with the front section of a torque tube universal joint? Then the speedometer drive, slip yoke bushing, fluid seal, and slip yoke will all be over the counter parts. That would drop the price by a bunch!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
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