[Fred Kiehl]

The G80 was not an option on a D body, because they have traction control. They also have 4 wheel antilock brakes, not the 2 front and 1 differential rear on the B body.

 

[Fred Kiehl]

Touché, Fred.
Just 'cause GM wouldn't, though, doesn't stop anyone from installing a limited slip differential themselves.

The LSD is redundant with traction control. The LSD is preferable to traction control for me, because it does not use the brakes.

 

[Fred Kiehl]

They are redundant when installed on the same car. If you like TC, put it first, if you like the LSD, put it first.

 

[Fred Kiehl]

I like the the Eaton Truetrac LSD. Nothing to rebuild, quiet, and almost instantaneous. Uses spiral gears.

 

[Fred Kiehl]

I have a couple of the RM A/C head units. PM me.