This may be the one you are thinking of.
[URL=http://forum.ls1truck.com/index.php?showtopic=4171&hl=
If that link dosen't work (I'm new to this), the title of the thread is:
LS1 AC compressor mounting solution, For 88-95 GM trucks,
and was started June 2, 2005.
'92 Fullsize, swb rc
5.3L/T56 conversion, comp XR275 HR cam .566/.568 lift 222/224 duration 112 lsa, crane dual springs, trick flow push rods, K&N Filter, Nelson Performance tune, Keisler shifter relocation kit, Boyd Coddington Smoothie II 18x8 235/55 up front, 18x10 295/45 out back, 2/4 drop, eaton lsd w/4.56 gears