8.75 green wheel bearing end play?

How would I go about checking if they have the SBP flange offset?

Just have to route the park brake cables and make brake lines now.

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Looks like you beat me to it, in your situation the easiest way to tell if you have the right flange offset would be to install the rotors and see if the caliper lines up. Looks like it does, so you're fine!

If they had the SBP flange offset, the rotor would sit further in and wouldn't line up with the caliper.