8 3/4 wheel adapter flange.

My 73 340 Dart Sport acquired an 8 3/4 rear end sometime prior to 1976. My guess it was for the anson sprint wheels it still has. My question is whether there is a recommended torque value for these. Also, I’m guessing that there are aftermarket as I can’t find any info on them in the 1973 service manual. Any ideas?
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