not sure how common those particular diffs are in austrailia, but it would be an excellent choice for a LSD upgrade! D had a pic that compared the alfa diff to the H165 and there isn't much difference in width.

Heres a link to a site with details on the Alfa diff tht I have been using from a late eighties Alfa Berlina 4,3:1 ratio. You also get em in 4,11 & 4,54 & 3,9. Check the local Alfa Club, maybe there are some lying about.
http://www.alfamilano.com/articles/lsd/alfa_lsd_rebuild.html
By the way, the diff housing/casing is partly aluminium but I can assure you the bearing carriers are definitely not. From all reports, they seem to handle up to 500Nm of wheel torque before they pop - remember its torque that kills drivetrain parts, not kilowatts.

im using a stanza diff in my 1200 with a L20 it was 40mm to wide so they got pintara chasers with different offset which changed it to only 20mm wider then engineered if this helps.not sure if there is an lsd centre for it though now that i have put an sr20 in im going for r31 lsd

yes i know that!

i didn't put my name down on the list on topgears list, besides he hasn't finished them yet has he?

the nismo LSD diff centre is relitivly expensive, i was hoping to pick up a diff thats already LSD and cut and shunt to suit the 1K.

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yes u can get h190 lsd topgear dose em and i think nismo do aswell and h165s are out of 1200 ute ans stanza h190 out of a bluebird

I'm going through the same dilema that you are, i have my A14turbo in my 1000 and after several snaped axels and diffs i want to re-do the rear end so that it copes with the extra power while keeping it light weight. The power output of an A14turbo wouldn't warrent using a big heavy diff, R31 and the like would be heavy and have a prefound effect on handling, espeically when used in a race car application.

I was looking a cut down H190 but i'm not sure if they are available in LSD? i might just settle on a H165 from a bluebirdand just lock/weld the diff centre up. There was a thread and also a pic posted the other day, there is a Alfa diff that similar to the H190 but it has a alloy bearing carrier and alloy bits but i think that they're pretty rare in austrailia, i haven't looked in to it to much.

I think with that engine and a tough diff your gearbox is going to be your weakest link, you wont be able to make the most of the diff, if hard launches and quick shifts are what you had planned.

i'M PRETTY SURE THE LATE 80S BOXIER SHAPE 4WD CARIBS HAVE THE SAME DIFF AS AN AE86, WITH DIFFERENT MOUNTING, SO COULD BE A EASIER OPTION TO GET HOLD OF

you would want something pretty light, would'nt want the diff to heavy. What about something like an AE86 LSD?

When I do the diff in mine I will opt for the hilux as the LSD units are heaps better and you can get more stuff and ratios for them. I will go for the true trac centre in mine.