Here's the latest on the bracket saga. I tried three sets sourced by Summit Racing, and when the third set (made by Grove) was going to hit stuff, I bit the bullet and fabricated (actually, I modified the last set I got). The folks at Summit were super about the returns, but when the third set didn't work, I felt embarrassed. After all, three times!
I used 1/4-inch aluminum plate to make the modified parts, and used as many parts as I could of Grove's stuff.
The compressor is off now, but with both in place, I measured and measured, and I am now certain--well, almost certain--that these will work. Here are some photos.