QUOTE(PRS914-6 @ Aug 20 2006, 10:07 PM)

The difference is like I said above, the mount sits in a hole so the mount is supported all the way around instead of hanging off 2 bolts and why I want to know the thickness of the metal....
yes, i understood that part.
i'm nowhere near my car right now and i already dropped off my box of 911 sport mounts for the RJ mount with mark, so i can't take a measurement for you right now ...
i did check them mounts when we put the engine back in and they did not looked warped or deformed ...
a simple solution would be to add a "brace" to the mount very much similar to what you machined for your shifter (the thing with the lip for the boot) ...
just make a flat piece of metal with a flanged edge for stability and add it under the 911 mount to give it support.
should be easy for you to make ...

Andy