Are you using an aftermarket unit or from a salvage swap? The aftermarket unit I used took the guess work placement. I have a 7" corvette style with the reinforced bracket that attached to the firewall & dash. Otherwise do as SW_Radical suggests.
Last edited by mobileortho; 01/31/2008 5:00 PM.
Robert C.
If it's true what they say, "You learn from your mistakes,"
I'm a Genius in the making.
1950 3600 
