I'd love to see all the info in one thread but compacted.

As for as fitment, all I need to know is block clearance, bolt patterns and also mods to the flexplate.
Basically how to make it work on a stand.

There is a very long thread about this I found and it mentions the bolt pattern is different and holes have to be drilled and tapped.
Block has to be grinded but where exactly ? Anything to save time and keep the twin engine Project progress. In return I will share my results and progress.

Then how to make it work on a K-frame.

This for the Twin Engine GTP's rear engine. Clearance front and back is not an issue.The rack and pinion is gone too.

What do I need electronically to make it shift right ?
Can I put it in safe mode like I can a 4T65E ? IE 2nd gear starts and manual shift to 3rd gear.
Or can it be set up with switches instead of ECU controlled shifts.
Which model had the tallest gear ratio ?

Axles: I read they fit the hubs but that you have to get a left side from an Aurora and the right side axle from an Eldorado to have the right lenghts ? (got that from Trannyman95's thread)

So any info from people who have worked with these trans would be helpful.