42/44/46RE----A500/518 question

uses the same trans as the 5.2 for the same year.

No it does not. The V8 is the larger 727 based A518/ 46RE

The V6 is the smaller A904 based A500/42/44RE

I'm not sure there is even a way to do this without hacking parts (redrill a 518 flex?) or aftermarket??