Made a mesh insert using black steel mesh I found in the gutter section at Lowes. It takes 3 pieces for about $12 total. I wasn't a fan of the large openings and when I took the grill off I had a nice pile of big bugs and 1 bird at the bottom of the radiator.
Once you get the grill off their are 6 plastic pins to get the air shroud off the back of the grill. I cut to fit and used .032 safety wire. I drilled some holes in the back to get a secure point an that might turn off some people.
Thanks OP , after dropping two pieces of paint stick under the carpet I went in the shop and found a 1/4" aluminum puck from a hole saw. That was a little to thick but still managed to get it under the frame. Drove it right after and wow was that noticeable ! 19k of getting used to the flex really made it stand out haha.
Thanks for the info and pictures Spurshot.
I went 10 to 22 brown and 26 to 26 brown to pink.
It was definitely easier to unplug brown for 10 to 22 and took all of 5 minutes