A518 trans shuffle ?

Hi Guys:
This question is one of pure ignorance on my part. I have never seen an A518 . I know it is the overdrive unit from the early 90's and I think it is only for a small block mopar ? Can the internals be exchanged into the big block 727 case ? like I said I haven't seen one and I wondered if it could be accomplished . Logic tells me there are electric parts involved , but I had to ask. Thanks in advance.

Author: ken