Thanks. It didn't come out how I'd originally planned but will work just fine and many times better than simply hanging there like the previous 30 years.
I had to rebend one end when it was found my replacement floor was much flatter than original and with a slight twist. I might lose points when the judges notice. Good chance I won't own it much longer, everything has to go.
Just the oven in the Kitchen. Car parts smell like Banana cake, Roast dinners smell like epoxy.
And for anyone that cares, the mastic sealing washers were by AMK, I found that NPD were good for stocking much of their range. I have about 4 sizes that were commonly used by GM on these cars, between trunk and spoiler parts, behind bumper brackets to trunk, marker lights and brake lights to trunk etc.
https://www.amkproducts.com/bulk-fasteners-listing/?codeforlookup=8430