Motor plate thought?

Jesus Chrysler said

Now, I don’t know much about anything, but was told not to use nutserts for structural applications. In keeping with my theme of not knowing much about anything, I have no clue what kind of loads would be put on that 1/4”? screw/bolt.

Click to expand...

I wouldn't use nutserts either! That rail sheet metal is pretty thin.
I used 3/8" Grade 8 bolts, a thick wall spacer as noted (just a hair below flush with both the top and bottom), a flat washer, lockwasher and nut underneath the rail. This is the view looking straight down before bolting the mount on.