Alex;
This might help, a photo of frans mule with the shifter cables attached. Fran made this beacket. The stock bracket can fit under the crossmember but you've got to grind about 3/8" off the top. When i was up in MI they were mounting another shifter on a new SLC. Mark pointed out that he liked to come in form the passenger side of the LS then route the cabel to several inches past the center of the LS on the drivers side. Then the shifter could follow the angle set up by the stock ricardo bracket. did that make sense?