The pics are of an original equipment driveshaft and slip yoke arrangement for a trans without a driveline parking brake. The only difference in the SM 420 for a torque tube driveline and an open shaft is the rear bearing retainer. Swapping the bearing retainer, output yoke, U joint, and slip yoke assembly is all that's needed to adapt the transmission to different applications. The only sticking point might be the speedometer drive gear, which must match the rear end ratio.
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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