I'm told this diff is a good choice for the 1200 but I can't find any info about it on this site. Are LSD's available? Does it bolt right in? How big is the ring gear?

910 or 510 ?

510

I just found this on dime quarterly:
510 Wagons:
The 1968-73 Datsun 510 wagons, because of their solid rear axle suspension, do not have the R-160 differentials, and therefore cannot use the Subaru LSD. Their 3.90 ratio differentials were an H-190 rear end, which is the same unit that came in the Datsun Roadsters and in some Datsun pick-up trucks. There are several different versions of this H-190 differential out there (with parts that aren't interchangeable). Check out the Nissan Motorsports Catalog or Datsun Roadster web pages for more information. Limited-slip units are available for these differentials too, but make sure you know what you're buying, as repair and rebuilds of these units can get expensive fast. Used units from roadsters seem to cost $500 to $800 each depending on ratio and condition. It may actually be cheaper to have a NEW Ford 8.8" or 9" limited slip rear end with shortened axles installed under a wagon, rather that going with a used roadster H-190 unit.

The 510 was not known as a 'Bluebird' in Australia, but the 310 & 410 series were, hence the confusion.

As far as I can tell, the 510 wagon used a H165 differential, at least here in Aust, & it would seem to be a fair bit of overkill in terms of cost, weight & strength to use the H190 behind a single carb L16.

Quote:

I know, I'm looking for a rear end to put behind a ka24de (possibly turbo) engine going in another prjoect of mine. My 1200 will keep its small, light rear end for sure. If only I could find a good LSD for the stock rear...

How would the 510 rear fit width-wise? Is it the same as a 1200 or wider?

Does anyone know if the '79-later 310 is the same width as the 1200?