I realize old thread is old, but just thought I'd point out for the 94+ guys that the rear brace will contact the factory bracing on the rear subframe:

http://i43.tinypic.com/vg08bq.jpg

http://i40.tinypic.com/14xijxu.jpg

(My apologies for the crappy pictures, and yes, that salt is gone now.)

A few washers under the brace will give you enough room. You can also invert the brace and run it over the exhaust instead of under.

True enough- not a criticism of the part by any means, just wanted to point it out.