Thats the info I was looking for cause the cummins trans is supposed to be a bit beefier he's a foreman at a weld/machine shop and is thinking of making an adapter.
Do you know what is supposed to be beefier about them? I rebuilt 1 a couple yrs. back and it had the standard heavy duty internals that I normally see in older big block torqueflites but that was all I noticed about it. It was an early one (1990) so maybe the later ones are beefed up more? Just a thought.