Watched the video. Interesting how U.S. accents differed in 1960, with clippier speech, like "Just the facts, ma'am", compared to today's chiller dude-speak.
Vertical fins on the old-style Plymouth give it yaw stability, though bad in crosswinds, while the new horizontal fins in the 1960 Chevy give pitch stability similar to an aircraft tail elevator, yet neither are aircraft. Alluding to aerospace was the-thing from 1957-67, with model names like Galaxy and Satellite, even the Mercury brand. Tailfins slowly shrunk, like a tadpole's tail, until by my 1965 Chrysler, they were just vestigial, though my car's body is purtier than a toad, a look attributed to the earliest Valiant.
Any slant six owners experience more right side tire wear, as the video suggests? Do short-stroke engines experience less cylinder wall wear, as claimed? I would think not since the rod is then at a larger angle to push the piston harder against the cylinder wall. The video imagines issues with shaft-mounted rocker arms, but a current racing upgrade in Chevy LS V-8 engines. The slant-six proved itself by dominating 6 cyl compact-class races of the day. But true that the early aluminum-block slants were unproven and did have corrosion issues to give head gasket leaks. Mrs. Parker seems entranced by the Plymouth push-button shifter. Buy the Plymouth and hubby gets lucky that night. Porsche also used longitudinal torsion bars, to keep suspension weight lower.