Yup, I agree. The 5.72” backspace belongs to the 17x8” Bullit wheels for the most part.
And that works up front, the 11.75” disks are BBP so that part works. The outer tie rod end can get pretty close to the rim, it’s pretty common to use an 1/8” spacer with that set up because the outer tie rod backspace limit is more like ~5.6”. Depends on the particular wheel though.
Agree with the 1” ish spacer on thr rear too, at least with an A-body 8 3/4 with the springs in the factory location.
The metric system is hands down a better system of measurement for everything you don’t measure with a tape measure. But if you use a tape measure how it’s supposed to be used, that’s precious little (and almost nothing automotive). If you’re using a proper ruler metric is easier because it’s 10 based. And if you’ve ever done engineering calculations with Imperial units then you know that engineering with Imperial units is an exercise practiced at the lowest level of Hell as the ultimate form of misery.
Ever heard of a slug? No, not the slimy animal thing in your garden, a slug is the unit of mass in the imperial system. I rest my case.