I did have to change the LSD output to the hardy spicer type. I don't have a measured increase in clearance sorry. It is still tight down there but I have had no issues since converting and with the pot joints no matter what I did it kept snagging / melting them. My guess is probably a 5mm radius reduction but that really is a guess just from memory
From your 65mph, 6.5K cruise speed in 6th I can confirm you are on a 3.4:1 ratio CWP differential.
This is your gearing 67mph @6.5k in 6th calculated)
Let me know if you want to utilise any other sprocket setups / gearing changes & i'll run it through the calc