The stamp is 10.9
I chose to do a stepped approach -
48 Nm (35 ftlbs) wasn't anywhere close to what they were when I pulled them off
64 Nm (48 ftlbs) still felt not tight enough compared to when I had taken them off
115 NM (84 ftlbs) I set to 84 and started to tighten, stopped when it felt close to the force it took to get them off - adjusted and measured at exactly 68 ftlbs - so that is what I went with.
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