Toyota 52-6fgcu35 s/n-61080 with gm 4.3l

16mm bolt passes through crank pulley and damper pulley into crankshaft. Strange setup as this pulley also drives the driveshaft for the hydraulic pump. There is no keyway or spline to keep the pulley from slipping so I guess the torque spec is important. If anyone is familiar with this set up any info would be appreciated. Torque spec, locktite if recommended.

Thanks