For past products, 2008 to 2018/19 era blocks were not produced with GM trans provisions, in spite of some early marketing statements to that effect.

Additional material was cast into them to provide enough meat for the different bolt holes (which I can post pics of later if it is of any help, just let me know),
but I was told that the double bolt pattern did not make the conversion any easier due to some other dimensional difference
that was not fully taken into account at the time,so the GM bolt pattern was deleted.

There was also a marketing promise of CGI material in late '07, that never made it to fruition. Other than the obvious statements
folks have made that it is harder on machine tools,
I was never told the exact reasons why that product was discarded and never produced.

Maybe Callies will make variants that Mopar never considered. Something to look forward to.