Hi chris will be interesting to see how your rear end turns out. The 1200 ute diff are pretty good for around 180hp depending also on how its driven. the axles seem to be the week link and hard to find. I have had several diferent types of diffs in my dattos over the years a RX2 diff behind the Jport 1200 ute. A 1200 ute diff with TRX discs behind the 1200 rally car project (never completed)& sold off and now the mitsibishi behind the CA18 turbo. I was going to go H190 LSd with alloy housing (1500 ute) and may still if money and time permits.
Cheers Andrew.
PS: congrats on becoming an uncle