Did you shave the hump down? I have 20" snowflakes, no spacer, shaved the hump.so I finally installed the 4-pots.
I needed 1/2" wheel spacers to get the wheel (22" snowflakes) to clear the calipers.
I used 2 washers for 1/8" to center the caliper.
hunting for other factory wheels that will clear the calipers..20s or 22s..