I believe Derek with the brown 240z with a Buick engine had or still has one. LT1 with a turbo. There were pics floating about it here many many years ago.
don't bother, even if you allready have one . the support for ls engines is way better as is the power potential. just my 2c
not exactly a G body. I have a 96 LT1 in my 71 el camino, direct from the corvette that crashed (not me) using OEM computer ( reworked) with 4L60E, nothing special, just smooth reliable quiet efficient. OH, and 25 MPG hiway!