I don't mind scraping anything at this point - just don't want to damage the (now I understand to be almost irreplaceable) shaker or bend the lip of the trunk that the bracket is around. I'll try the 45deg towards the rear.
1968 Fbird Conv - Well its mostly there. 8) - mine 2015 1979 Camaro RS - Summer DD - mine 2013 Now where did I put my flashlight? ;(