thanks everyone for your help,ive stumbled across a mystery toyota diff from aldente's collection! he thinks its out of a van or 80s wagon?hes not sure, but all i have to do is weld on my bits where the diff sits on the leaf springs and sort out the handbrake cable and then project fatsun will look the part,cheers!

I, used a Sigma wagon housing narrowed to 1200 width , changed studs in the axles , fitted original handbrake cables (Almost direct fit) to the sigma ,larger drums ,plus an lsd head . Just looks like it belongs there!!!!.

Mitsubishi Sigma/Scorpian is 90 mm wider I think.

The Toyota Corona's also ran a borgy of 114.3x4 I think. Maybe worth checking. . .

Someone already said stanza, right?

bluebird diff is wider than i ke30 diff im pretty sure, and ke30 is supposed to be 3 inches wider than stock

hilux diff (RN40, later models wider) is same width as AE86 at approx 56 inches wide
have been told hilux will fit 1200 if late camry fwd wheels used (unconfirmed) so ae86 may fit
dazza

I have a C20 Vanette diff in my racecar - not sure how much wider but it would be about the 90mm mark I suspect
It will be up for sale soon as I will be going to a ute diff while we build a H190 floater
Cheers

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Good thinking - 910 Bluebird must surely be wider? Assuming they ran these in the Bathurst Turbo racecar they should also be strong?

yeah I'd be looking at toyota ae86 it T18, or stanza? bluebird? 1600 wagon?

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That's surprising. The B310 is about 3" wider than a B110 so I'd have thought the diff would be at least a bit wider.

In any case, although I don't know the width, how about AE86 Corrolla (which I think also have discs) plenty of diff ratios, LSD options etc. Another thought is '70s/early '80s Mitsi Lancer or Gallant.

On my 1200 Coupe racecar I run a Ford Mk 2 Cortina diff (Sacrilege I know!). Plenty of ratios/ LSD options etc. Leaf spring mounts are same spacing but it's wider than Datsun. (Wider still is Escort diff.) Simply redrilled the stud pattern. Either way there's obviously some mods required so this was no biggie.

i have a falcon xp 4 x 114.3 diff in my backyard that is about 9cm wider than stock... if that helps with measurements.

1385mm drum to drum