My last employer had torque and angle specs for all critical fasteners: rod bearings, main bearings, cylinder head, and flywheel.
35 years ago the manufacturing line used people to tighten the bolts to a torque. They would put the biggest guys on head bolts and main bolts and rotate every two hours to a different station on the line. This was at a 150 or so engine per day build rate.
Now the critical fasteners have an Atlas Copco torque unit that tightens these bolts automatically at the prescribed torque/angle process at an 800 engine per day build rate.
You can see torque units at 2:33 and 3:28.