Had a good junkyard find a couple weeks ago - I was looking for a cylinder head to P&P, but instead found an '82 Celica Supra with an F303 axle code, which means it had a 7.5" LSD differential which would fit nicely on the front of my '88 (F=7.5" differential, the 3 at the end designates it as a 2 pinion LSD). This thread has all the pertinent info, except it fails to mention that you need to grind 1/4" off
both stub axles before sliding them into the differential (if you don't, the passenger side won't seal and the driver side will push the bearing in the halfshaft tube out 1/4") -
The *official* 7.5" Supra LSD into a IFS diff thread.
out of the Celica Supra housing - I ended up reusing the original Celica bearings, even though they had 205k miles on them they still looked good
Disassembled - I ended up shimming the LSD springs ~ .075" to add just a little bit more bite. Not shown, but the side gear clutch material still looked really good for the mileage on this unit
To me, this looks like it should have steel plates splined to the side gear for better torque biasing - the 8" LSD does, still researching options on this
I didn't take any pics of the install and set up as that is covered in the link. I was able to get the same exact backlash as what it had using a combination of the Celica Supra shims and the shims that were in the 4runner housing. One word of caution, when I called a Toyota dealer to order a shim, they told me that the part number was good but has been discontinued.
I still need to test it out (maybe Hungry Valley this weekend as it's right up the road) and after I put a few miles on it change the oil.
*edit* tested and works good - make sure to use GM LSD additive in the gear oil (at the recommendation of the local Toyota dealer)