The only thing that looked like it might be a problem was the resonator.
|The width was cut to match the front panel, which was based on the car's frame rails.|
|Precision paint cans.|
I went ahead and fastened the front of the sheet with some more stainless self-drilling screws, sliding it under the front panel for optimal airflow. This sheet is about 3'x4' and I put a screw about every 10 inches for the entire length of the frame rails, for a total of eight screws. I used large washers again to try to spread the load as much as possible.
|Notice the large washers|
The bolts for the rear chassis braces use a different thread than the fronts for some reason. They both have a 17mm head, but the fronts, as you may recall, are M12x1.25 whereas the rears are M12x1.5. This meant I got to return to the hardware store to exchange my expensive bolts.
I probably would have had to go back even if the threads matched because I decided to just use spacers to go under the resonator instead of trimming the sheet around it. That meant I needed a longer bolt and some more of the thick washers I was using as spacers. When I had the appropriate hardware, I used my old trick with the dead blow hammer and drilled some holes. They lined up perfectly, and the second piece was secure. I will probably do a little trimming around the rear suspension, but not a lot.