Here's a musty, crusty old thread that may be of some interest. As one of the contributors to it alluded, it had been a fairly hot topic in the past. The overall takeaway being, that if there was a practical way of achieving a successful outcome along these lines, the pathway towards doing so would have been blazed long ago. That dog purdy much jes don't wanna hunt.
I am in the process of attempting to rebuild a friend's 4l60 out of his cheby peekup and I got access to a Mitchell service and repair manual for domestic cars, light trucks and vans for the early '90s. Out of curiosity I went back the the Chrysler section, as I have rebuilt the 727 in our...
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Although the chopping, swapping and welding of different aluminum bolt patterns to different cases could might work if one had the skills and the means to do it properly.