Cyl. head nuts- 290-340=28-32 ft.-lbs 400-440=16-18 ft.-lbs
The following are correct for 290 thru 440 engines:
Cyl. base nuts are 16-18 ft.-lbs
Flywheel nut is 44-55 ft.-lbs
Intake manifold nuts are 16-18 ft.-lbs
Fan housing screws are 16-18 ft.-lbs
Fan wheel nut is 22-24 ft.-lbs
Ring gear screws (6mm) are 6-7 ft.-lbs
Ring gear screws (8mm) are 10-12 ft.-lbs
Be sure you install and torque the intake manifold before you torque the cyl. base nuts.
Good luck!
Let me know if ya need anything else.
These specs came from my '80 scorpion service manual and also agree with my cuyuna engine service manual.