Back in the old days there were no torque specs for crank arms, or if there were they never filtered down to us proles. Whether the taper should be greased or not was never discussed either. You torqued it until reasonably snug to a calibrated hand, rode some then remembered to tighten it again, always being careful not to over-tighten though that was never discussed either. I never had a crank come loose back then.