i just used 4 or five thick washers to make 318 style insulator to fit my 360.. had a hard time finding some 340/360 mounts so the washers worked perfectly
On my 71 challenger the right side rear wheel sits out 1/2 inch further than the left.. i noticed this on my 70 and 73 challengers i have owned in the past. Do any of your e-bodies have this problem?