What Nubcake said, that is the wrong bracket. Here is a pic that you can see the bracket in.
And that spacer you are using goes under this bracket. Right off hand it looks like the engine/trans are too far back.
2003 White RS6 2013 Midnight Blue S5
2013 Daytona RS5 2x944 Turbo's 1974 911 w/'91 3.6ltr motor
Roy, WA