
From what I have been able to learn:
* L series (1.59:1) will fit with 4.111 crown wheel with some modification, ie, grinding some metal off the edge of the crown wheel. This is not in the contact patch so doesnt affect reliability. It also needs other mods to fit the input shaft, etc.
* The L series LR will fit with a 4.44 crown wheel with some difficulty. This means removing metal inside the contact patch! A remedy is to move the crown wheel to the side a little, but this is not recommended & reliability is a concern. AFAIK, this has only been done once & has no issues apart from a whine, but was only done about a year ago so reliability is not known. I'm not happy doing this!
* There are some other mods that need to be done to fit the L series LR to the input shaft. These get technical so I cant really explain them much & are covered in other threads. Its enough to know its not a simple swap!
* The All Drive Subaroo LR doesnt need any mods to fit the input shaft unlike the L series LR, it simply fits straight in

* The ADS LR will fit with the 4.111 with no mods or 4.44 with just a "smidge" taken off. Rick says it doesnt need much taken off.
* ADS can supply Subaru 4.44 crown wheels & matching 5th gear. This 5th gear keeps the revs the same on the highway as it would be with 4.111. The ratio you need depends on the vehicle but for an SF is 0.781. They also have 0.738 (to drop the revs further to about 2700 (SF) or for an SG) or .825 (I think this is for those with bigger tyres). The 4.44 crown wheel new is ~$600 machined or 2nd hand machined is ~$400. 5th gear is ~$280.
* They can also supply Cusco plated LSDs (not sure about KAAZ). Venom has one of each! There is also a Cusco centre diff but I will be going with a DCCD
So...they are keen for us to do a group buy. They wont know any more about LR pricing until prob August when (hopefully) they get their first shipment in. The more people who get involved in this the less we will each have to pay.
I'll keep editing this post as more information becomes available. As I post prices, note that this is approximate only & will reduce the more that is bought.
So if you have been thinking about building an offroad box, get in now & take advantage of this deal. Its unlikely in the future there will be enough people to do a group buy again, so don't miss out!