I was "318", when 318 wasn't cool......

Thought Chrysler bought the slant 6 design from General Motors. I could be wrong. But thought I read that somewhere.

The Slant-6 was a clean-sheet design, fully in-house at Chrysler. GM had utterly zero to do with it at any stage. Also, the moon landing actually happened on the moon and not on a Hollywood set, water is wet, the 2020 US Presidential election wasn't stolen, and basset hounds got long ears.