1986 T Type Regal - FBI Undercover; unique modifications
I was recently looking for a Buick GNX and ran across an ad for a 1986 Buick Regal T-Type with the following description of the rear suspension; "... the rear lower control arms being boxed, and installed upside down."
My question is what is this and why is it a good thing (at least the context would suggest it to be)?