Forgive my ignorance but wouldn't an LSD prevent chirping in turns? I thought only closed diffs chirped.

The application guide here indicates it's not meant for road racing but good for "street to strip" whatever that's supposed to mean:

http://www.precisiongear.com/powerbrute.htm#

http://www.precisiongear.com/pblegend.htm

How strong are the KM145s are far as torque goes, BTW? Worth rebuilding or better to upgrade with a diesel motor putting out 160 ft lbs.?