This thing continues to surprise me.
Got the back end in bits and had the diff out, was going to buy a rebuild kit but it really doesn't need it, the oil inside was clear as well, used to opening diffs and finding a black gooey mess but not in this case.
Ordered a Taylor RC rear diff case, shock tower, rear brace and diff oil to get me going.
Thinking I might mock it up on the stock chassis and then when it is all done (less motor etc) will transfer it all to a Taylor RC chassis, still toying with maybe sticking with petrol and getting a big bore engine so working along those lines.
If I do go brushless it will be 12s, hence me going a bit overkill with the rebuild ether way.