steering column to dash, mounting bracket

[milton]

On attaching the bracket to the dash I've noticed that the face of the bracket in contact to the dashboard is not flat. With the lower two 3/16 nuts and setscrews tightened the top 1/3 of the bracket is not in contact with the dash and even appears to be slightly concave. Should there be a spacer/washer between the dash and bracket where the 5/16 setscrew attaches? Without this the dash could be twisted when it is all tightened up.
Milton

[661]

Assuming the back of the dash is flat, preferably machine the bracket flat or use a washer or two as a spacer.