Is this enough space on my rear wheels? 18” wheels

I mounted up the 18x10 +6 last night. T his is on a stock spring location 8.25 w/drum brakes and a 3/8” spacer on each side. This equals 52.25 spacer to spacer. An A-body 8.75 is 52.625”. I’ll still need the spacer or cut my B-body housing to a 53 - 53.25” flange to flange.
The back lip touches the spring so I would still need spacers on an A-body 8.75.

Does the rear Dr. Diff 11.7” brake kit move the WMS out?

View attachment 1716158164

View attachment 1716158166

View attachment 1716158167

Any rear disk kit will act like a 1/4" spacer or so, due to the slip on rotor.