That is what I was told.Bruce, I bought my t56 from D&D performance. At the time, they converted an LSx for me to use with my LT1.
They said the only thing they needed to change for the conversion was the bellhousing, midplate, and input shaft. So, to convert the other way, you would just need to change these three items.
But with this setup wouldn't you have to use that funky pilot bearing that is like 2 inches long or something, I am going on memory here but I remember something like that.If you want to change over without going into the case there may be an approx. $450 Quicktime or McLeod adapter/bellhousing application. It may allow you to retain your existing puller slave cyl. configuration too, - or not. Just a thought.