There is an LSD offered that's similar to a Torsen T2R, and I want to use one in my truck rear axle.

Will it fit?

Are modifications necessary?

 

Check out gearinstalls.com

I'm not sure about a torsen LSD but the clutch style from the early supra drop in really easily and work very well. I followed the instructions/advice off gearinstalls.com and did it myself.

One tire on ice and the other on dry road, high rpms and heavy foot, my truck will still track straight.
With an open diff, I would slide around until I let off the gas or found traction.

 

Thanks for the link. Still not sure if the Lexus diff will fit, but the info you pointed me to is very useful.