What Mopar parts have you found in brand X cars through the years?

A close friend's 53 Chevy, had a 8 3/4 and a Cordoba cross torsion bar k frame under it. the 8 3/4 came out from under a 68 Barracuda, the spring perches were within 1/8 of an inch for the Chevy, and the same spring width. angle was different though. Have seen the Cordoba front suspension under a lot of different street rods.